Vehicle and printing pastes for use in the manufacture of microelectronic packages

Claim 2

In a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises at least one low boiling temperature solvent having a vapor pressure of less than about 2mm Hg at a temperature in the temperature range of about 20°C. -25.20 C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and at least one high boiling temperature solvent having a vapor pressure of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder possesses the property of being substantially thermally stable at temperatures below about 200°F. and comprises about 10-35 weight percent of said vehicle, said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle.

Claim 3

In a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises at least one low boiling temperature solvent having a vapor pressure of less than about 2mm Hg at a temperature in the temperature range of about 20°- 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120°F. - 200°F., and at least one high boiling temperature solvent having a vapor pressure of about 1mm Hg or less at a temperature in the temperature range of about 120°- 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200°F. to about 400°F., and wherein said thermally stable binder consists of poly (alpha-methyl) styrene having a molecular weight of about 250-1000 and comprises about 10 - 35 weight percent of said vehicle, said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle.

Claim 4

In a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises at least one low boiling temperature solvent having a vapor pressure of less than about 2mm Hg at a temperature in the temperature range of about 20°- 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120°F. - 200°F., and at least one high boiling temperature solvent having a vapor pressure of about 1mm Hg or less at a temperature in the temperature range of about 120°- 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200°F. to about 400°F., and wherein said thermally stable binder consists of poly (alpha-methyl) styrene having a molecular weight of about 250-1000 and comprises about 10 - 35 weight percent of said vehicle, said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle.

Claim 5

In a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises at least one low boiling temperature solvent having a vapor pressure of less than about 2mm Hg at a temperature in the temperature range of about 20° - 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and at least one high boiling temperature solvent having a vapor pressure of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder comprises about 10 - 35 weight percent of said vehicle, said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle, and wherein said thermally stable binder comprises poly (alpha-methyl) styrene having a molecular weight of about 250-1000, and wherein said low boiling temperature solvent comprises a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and wherein said high boiling temperature solvent comprises polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights.

Claim 6

In a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises at least one low boiling temperature solvent having a vapor pressure of less than about 2mm Hg at a temperature in the temperature range of about 20° - 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and at least one high boiling temperature solvent having a vapor pressure of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder comprises about 10 - 35 weight percent of said vehicle, said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle, and wherein said thermally stable binder comprises poly (alpha-methyl) styrene having a molecular weight of about 250-1000, and wherein said low boiling temperature solvent comprises a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and wherein said high boiling temperature solvent comprises polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights.

Claim 7

In a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system fpr said binder, the improvement wherein said solvent system comprises at least one low boiling temperature solvent having a vapor pressure of less than about 2mm Hg at a temperature in the temperature range of about 20° -25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and at least one high boiling temperature solvent having a vapor pressure of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder has a specific gravity at 60/60°C. of about 1.01 and a refractive index at 60°C. of about 1.58 and comprises about 10-35 weight percent of said vehicle and further comprises poly (alpha-methyl) styrene having a molecular weight of about 250-1000, and wherein said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and further comprises a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and wherein said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle and further comprises diisobutyl adipate or polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights.

Claim 8

In a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system fpr said binder, the improvement wherein said solvent system comprises at least one low boiling temperature solvent having a vapor pressure of less than about 2mm Hg at a temperature in the temperature range of about 20° -25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and at least one high boiling temperature solvent having a vapor pressure of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder has a specific gravity at 60/60°C. of about 1.01 and a refractive index at 60°C. of about 1.58 and comprises about 10-35 weight percent of said vehicle and further comprises poly (alpha-methyl) styrene having a molecular weight of about 250-1000, and wherein said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and further comprises a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and wherein said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle and further comprises diisobutyl adipate or polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights.

Claim 9

In a liquid vehicle according to claim 1, wherein said low boiling temperature solvent comprises a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol.

Claim 10

In a liquid vehicle according to claim 1, wherein said high boiling temperature solvent comprises diisobutyl adipate.

Claim 11

In a liquid vehicle according to claim 1, wherein said high boiling temperature solvent comprises polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights.

Claim 12

In a liquid vehicle according to claim 1, wherein said thermally stable binder consists essentially of poly (n-butyl methacrylate), and wherein said low boiling temperature solvent consists essentially of a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and said high boiling temperature solvent comprises diisobutyl adipate.

Claim 13

In a liquid vehicle according to claim 8, wherein said liquid vehicle comprises about 50 weight percent of said terpineol mixture and about 50 weight percent of a mixture of said thermally stable binder and said diisobutyl adipate, and wherein the weight ratio of said diisobutyl adipate to said poly (n-butyl methacrylate) is about 3:1.

Claim 14

In a liquid vehicle according to claim 1, wherein said thermally stable binder consists of poly (alpha-methyl) styrene having a molecular weight of about 250-1000.

Claim 15

In a liquid vehicle according to claim 1, wherein said thermally stable binder comprises poly (alpha-methyl) styrene having a molecular weight of about 250-1000, and wherein said low boiling temperature solvent comprises a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and wherein said high boiling temperature solvent comprises polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights.

Claim 16

In a liquid vehicle according to claim 1, wherein said thermally stable binder has a specific gravity at 60/60°C. of about 1.01 and a refractive index at 60°C. of about 1.58.

Claim 17

In a liquid vehicle according to claim 3, wherein said thermally stable binder has a specific gravity at 60/60°C. of about 1.01 and a refractive index at 60°C. of about 1.58.

Claim 18

In a printing paste including at least one finely divided, particulate inorganic material and a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises a low boiling temperature solvent having a vapor pressure less than about 2mm Hg at a temperature in the temperature range of about 20° - 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and a high boiling temperature solvent having a vapor pressure in the vapor pressure range of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder possesses the property of being substantially thermally stable at temperatures below about 200°F. and comprises about 10 - 35 weight percent of said vehicle, said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle, and wherein said vehicle comprises about 8-20 weight percent of said paste and said particulate inorganic material consists of a sealing glass comprising about 80-92 weight percent of said paste.

Claim 19

In a printing paste including at least one finely divided, particulate inorganic material and a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises a low boiling temperature solvent having a vapor pressure less than about 2mm Hg at a temperature in the temperature range of about 20° - 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and a high boiling temperature solvent having a vapor pressure in the vapor pressure range of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder possesses the property of being substantially thermally stable at temperatures below about 200°F. and comprises about 10 - 35 weight percent of said vehicle, said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle, and wherein said vehicle comprises about 8-20 weight percent of said paste and said particulate inorganic material consists of a sealing glass comprising about 80-92 weight percent of said paste.

Claim 20

In a printing paste including at least one finely divided, particulate inorganic material and a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises a low boiling temperature solvent having a vapor pressure less than about 2mm Hg at a temperature in the temperature range of about 20° - 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and a high boiling temperature solvent having a vapor pressure in the vapor pressure range of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder comprises about 10 - 35 weight percent of said liquid vehicle and about 8 - 20 weight percent of said paste and consists of a poly (alpha-methyl) styrene having a molecular weight of about 250-1000, and wherein said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and consists of a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and wherein said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle and consists of a polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights, and wherein said particulate inorganic material consists of a sealing glass comprising about 80 - 92 weight percent of said paste.

Claim 21

In a printing paste including at least one finely divided, particulate inorganic material and a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises a low boiling temperature solvent having a vapor pressure less than about 2mm Hg at a temperature in the temperature range of about 20° - 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and a high boiling temperature solvent having a vapor pressure in the vapor pressure range of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder comprises about 10 - 35 weight percent of said liquid vehicle and about 8 - 20 weight percent of said paste and consists of a poly (alpha-methyl) styrene having a molecular weight of about 250-1000, and wherein said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and consists of a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and wherein said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle and consists of a polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights, and wherein said particulate inorganic material consists of a sealing glass comprising about 80 - 92 weight percent of said paste.

Claim 22

In a printing paste including at least one finely divided, particulate inorganic material and a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises a low boiling temperature solvent having a vapor pressure less than about 2mm Hg at a temperature in the temperature range of about 20° - 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and a high boiling temperature solvent having a vapor pressure in the vapor pressure range of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder comprises about 10 - 35 weight percent of said vehicle, said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle, and wherein said vehicle comprises about 8 - 20 weight percent of said paste and said particulate inorganic material consists of a sealing glass comprising about 80 - 92 weight percent of said paste, and wherein said thermally stable binder comprises poly (alpha-methyl) styrene having a molecular weight of about 250-1000, and wherein said low boiling temperature solvent comprises a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and wherein said high boiling temperature solvent comprises diisobutyl adipate or polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights.

Claim 23

In a printing paste including at least one finely divided, particulate inorganic material and a liquid vehicle comprising a thermally stable binder which may be decomposed or pyrolyzed practically completely and a solvent system for said binder, the improvement wherein said solvent system comprises a low boiling temperature solvent having a vapor pressure less than about 2mm Hg at a temperature in the temperature range of about 20° - 25°C. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of about 120° - 200°F., and a high boiling temperature solvent having a vapor pressure in the vapor pressure range of about 1mm Hg or less at a temperature in the temperature range of about 120° - 200°F. and having a vapor pressure in the vapor pressure range of about 2 - 100mm Hg at a temperature in the temperature range of above about 200° to about 400°F., and wherein said thermally stable binder comprises about 10 - 35 weight percent of said vehicle, said low boiling temperature solvent comprises about 30 - 70 weight percent of said vehicle and said high boiling temperature solvent comprises about 20 - 40 weight percent of said vehicle, and wherein said vehicle comprises about 8 - 20 weight percent of said paste and said particulate inorganic material consists of a sealing glass comprising about 80 - 92 weight percent of said paste, and wherein said thermally stable binder comprises poly (alpha-methyl) styrene having a molecular weight of about 250-1000, and wherein said low boiling temperature solvent comprises a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and wherein said high boiling temperature solvent comprises diisobutyl adipate or polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights.

Claim 24

In a printing paste according to claim 15, wherein said thermally stable binder has a specific gravity at 60/60°C. of about 1.01 and a refractive index at 60°C. of about 1.58.

Claim 25

In a printing paste according to claim 17, wherein said paste has a viscosity of about 38,000-46,000 centipoise.

Claim 26

In a printing paste according to claim 18, wherein said particulate inorganic material comprises about 88 weight percent of said paste.

Claim 27

In a printing paste according to claim 14, wherein said binder is a poly (n-butyl methacrylate), said low boiling temperature solvent is a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and said high boiling temperature solvent is diisobutyl adipate.

Claim 28

In a printing paste according to claim 20, wherein said vehicle comprises about 50 weight percent of said terpineol mixture and about 50 weight percent of a mixture of said thermally stable binder and said diisobutyl adipate, and wherein the weight ratio of said diisobutyl adipate to said poly (n-butyl methacrylate) is about 3:1.

Claim 29

In a printing paste according to claim 21, wherein said paste has a viscosity of about 38,000-46,000 centipoise.

Claim 30

In a printing paste according to claim 22, wherein said particulate inorganic material comprises about 88 weight percent of said paste.

Claim 31

In a printing paste according to claim 14, wherein said low boiling temperature solvent comprises a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol.

Claim 32

In a printing paste according to claim 14, wherein said high boiling temperature solvent comprises diisobutyl adipate.

Claim 33

In a printing paste according to claim 14, wherein said high boiling temperature solvent comprises polypropylene glycol having an average molecular weight of about 200 or 400 or mixtures of such average molecular weights.

Claim 34

A printing paste according to claim 16, wherein said thermally stable binder has a specific gravity at 60/60°C. of about 1.01 and a refractive index at 60°C. of about 1.58.

Claim 35

A printing paste according to claim 14, wherein said thermally stable binder consists of poly (n-butyl methacrylate), said low boiling temperature solvent consists of a mixture of isomeric terpineols composed predominantly of alpha-terpineol with minor amounts of beta-terpineol and gamma-terpineol, and said high boiling temperature solvent consists of diisobutyl adipate.

Claim 36

In a printing paste according to claim 28, wherein said vehicle comprises about 50 weight percent of said terpineol mixture and about 50 weight percent of a mixture of said thermally stable binder and said diisobutyl adipate, and wherein the weight ratio of said diisobutyl adipate to said poly (n-butyl methacrylate) is about 3:1.

Claim 37

In a printing paste according to claim 14, wherein said thermally stable binder consists of poly (alpha-methyl) styrene having a molecular weight of about 250-1000.

Claim 38

In a printing paste according to claim 14, wherein said thermally stable binder has a specific gravity at 60/60°C. of about 1.01 and a refractive index at 60°C. of about 1.58.

Claim 39

In a printing paste according to claim 14, wherein said paste has a viscosity of about 38,000-46,000 centipoise.

Claim 40

In a printing paste according to claim 32, wherein said particulate inorganic material comprises about 88 weight percent of said paste.