EP0064700A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Conductor compositions
Assignee: EIDP Inc
•
Filing: 1982-05-01
•
Granted: —
•
Expires: 2002-05-01
Abstract
Abstract Palladium/silver metallizations having excellent solderability and aged adhesion are obtained by substituting for the palladium copper and/or certain transition metals or binary metal oxides and concomittantly reducing the amount of inorganic binder.
Inventors
- 👤 John James Felten
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 03:51
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H01; H01B; H01B1/00; H01B1/14; H01B1/16
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
135 words
A palladium/silver metallization suitable for the manufacture of printed conductors which is an admixture of A. 82-97% by weight of finely divided particles of metallic materials comprising by weight (1) 40-70 parts silver metal; (2) 1-25 parts palladium metal; and (3) 1-25 parts of a base metal material selected from the group consisting of first series transition metals, transition metal binary oxides and mixtures thereof; and B. 3-18% by weight finely divided particles of inorganic binder dispersed in organic medium, in which admixture the weight ratio of silver to palladium is greater than 2.5, the weight ratio of base metal material to palladium is 0.05-1.5, the weight ratio of base metal material to inorganic binder is 0.1-1.75 and the sum of base metal material. and inorganic binder is no more than 18 parts by weight.
Claim 2
Dependent Claim
135 words
A palladium/silver metallization suitable for the manufacture of printed conductors which is an admixture of A. 82-97% by weight of finely divided particles of metallic materials comprising by weight (1) 40-70 parts silver metal; (2) 1-25 parts palladium metal; and (3) 1-25 parts of a base metal material selected from the group consisting of first series transition metals, transition metal binary oxides and mixtures thereof; and B. 3-18% by weight finely divided particles of inorganic binder dispersed in organic medium, in which admixture the weight ratio of silver to palladium is greater than 2.5, the weight ratio of base metal material to palladium is 0.05-1.5, the weight ratio of base metal material to inorganic binder is 0.1-1.75 and the sum of base metal material. and inorganic binder is no more than 18 parts by weight.
Claim 3
Dependent Claim
134 words
A palladium/silver metallization suitable for the manufacture of printed conductors which-is an admixture of A. 82-97% by weight of finely divided particles of metallic materials comp4ising by weight (1) 40-70 parts silver metal; (2) 1-25 parts palladium metal; and (3) 1-25 parts of a base metal material selected from the group consisting of copper metal, copper oxide, cobalt oxide, nickel ox.de and mixture thereof; and B. 3-18% by weight finel divided particles of inorganic binder dispersed in organic medium, in which admixture the weight ratio or silver to palladium is greater than 2.5, the weight ratio of base metal material to palladium is 0.05-1.5, the weight ratio of base metal material to inorganic binder is 0.1-1.75 and the sum of base metal material and inorganic binder is no more than 18 parts by weight.
Claim 4
Dependent Claim
134 words
A palladium/silver metallization suitable for the manufacture of printed conductors which-is an admixture of A. 82-97% by weight of finely divided particles of metallic materials comp4ising by weight (1) 40-70 parts silver metal; (2) 1-25 parts palladium metal; and (3) 1-25 parts of a base metal material selected from the group consisting of copper metal, copper oxide, cobalt oxide, nickel ox.de and mixture thereof; and B. 3-18% by weight finel divided particles of inorganic binder dispersed in organic medium, in which admixture the weight ratio or silver to palladium is greater than 2.5, the weight ratio of base metal material to palladium is 0.05-1.5, the weight ratio of base metal material to inorganic binder is 0.1-1.75 and the sum of base metal material and inorganic binder is no more than 18 parts by weight.
Claim 5
Dependent Claim
16 words
The metallization of claim 1 in which the silver metal content is 45-70 parts by weight.
Claim 6
Dependent Claim
15 words
The metallization of claim 1 in which the palladium content is 3-17 parts by weight.
Claim 7
Dependent Claim
17 words
The metallization of claim 1 in which the base metal material content is 1-6 parts by weight.
Claim 8
Dependent Claim
28 words
The metallization of claim 1 in which the metallic materials contain by weight 49.6 parts silver, 10.6 parts palladium, 6.0 parts copper oxide, and 1.0 part nickel oxide.
Claim 9
Dependent Claim
22 words
The metallization of claim 1 in which the inorganic binder is high bismuth glass or a mixture of glass and bismuth oxide.
Claim 10
Dependent Claim
18 words
The metallization of claim 6 in which the glass binder contains at least 50% by weight bismuth oxide.
Claim 11
Dependent Claim
57 words
A method for making a printed conductor comprising A. applying a film of the composition of claim 1 to an inorganic substrate; B. drying the film at 80-150°C for 5-15 minutes; and C. firing the dried film at 800-1050°C for a time sufficient to effect volatilization and removal of the organic medium and sintering of inorganic binder.
Claim 12
Dependent Claim
16 words
The method of claim 9 in which the silver metal content is 45-70 parts by weight.
Claim 13
Dependent Claim
15 words
The method of claim 9 in which the palladium content is 3-17 parts by weight.
Claim 14
Dependent Claim
17 words
The method of claim 9 in which the base metal material content is 1-6 parts by weight.
Claim 15
Independent Claim
27 words
The method of claim-9 in which the metallic material contained by weight 49.6 parts silver, 10.6 parts palladium, 6.0 parts copper oxide and 1.0 part nickel oxide.
Claim 16
Dependent Claim
14 words
The method of claim 9 in which the inorganic binder is high bismuth glass.
Claim 17
Dependent Claim
18 words
The method of claim 14 in which the glass binder contains at least 50% by weight bismuth oxide.
Claim 18
Dependent Claim
32 words
A conductive layer comprising a thick film of the composition of claim 1 which has been fired to remove the organic medium and to effect sintering of the inorganic binder and metallization.
Claim 19
Dependent Claim
38 words
A printed conductor element comprising a thick film of the composition of claim 1 printed upon an inorganic substrate which has been fired to remove the organic medium and to effect sintering of the inorganic binder and metallization.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.