US5302467A — Halogenated polyimide composition having improved…

Claim 1

Independent Claim 75 words

An article comprising: a substrate; an imidized layer of a reaction product of a halogenated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water added to said polyamic acid about 5 minutes to about 8 hours before application of said imidized layer to a surface of said substrate to cleave up to about 3% of the polyamic acid molecules; and at least one metal layer disposed on said imidized layer.

Claim 2

Dependent Claim 75 words

An article comprising: a substrate; an imidized layer of a reaction product of a halogenated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water added to said polyamic acid about 5 minutes to about 8 hours before application of said imidized layer to a surface of said substrate to cleave up to about 3% of the polyamic acid molecules; and at least one metal layer disposed on said imidized layer.

Claim 3

Dependent Claim 34 words

The article of claim 1 wherein said halogenated polyamic acid comprises the following structure: ##STR5## where n is an integer sufficient to provide a structure having an average molecular weight of at least 5000.

Claim 4

Dependent Claim 34 words

The article of claim 1 wherein said halogenated polyamic acid comprises the following structure: ##STR6## where n is an integer sufficient to provide a structure having an average molecular weight of at least 5000.

Claim 5

Dependent Claim 38 words

The article of claim 1 wherein said metal layer comprises: an electrolessly applied first metal layer disposed on said surface; and an electrolytically applied or an electrolessly applied second metal layer disposed on top of said first layer.

Claim 6

Dependent Claim 12 words

The article of claim 4 wherein said first metal layer is nickel.

Claim 7

Dependent Claim 12 words

The article of claim 4 wherein said second metal layer is copper.

Claim 8

Dependent Claim 45 words

The article of claim 1 wherein said halogenated polyamic acid comprises the following structure: ##STR7## where R' is a halogenated alkyl group, A is a substituted or unsubstituted phenylene or diphenyl ether group, and R is an organic group of 5 to 50 carbon atoms.

Claim 9

Dependent Claim 31 words

The article of claim 7 wherein said organic group is selected from the group consisting of an unsubstituted aliphatic, halogen substituted aliphatic, alicyclic, aromatic, heteroaliphatic, heteroalicyclic, heteroaromatic radical and combinations thereof.

Claim 10

Dependent Claim 14 words

The article of claim 7 wherein R is a benzene or fused polynuclear ring.

Claim 11

Dependent Claim 12 words

The article of claim 7 wherein said halogenated alkyl group is fluorinated.

Claim 12

Dependent Claim 76 words

An article comprising: a substrate; an imidized layer of a reaction product of a partially fluorinated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water added to said polyamic acid about 5 minutes to about 8 hours before application of said imidized layer to a surface of said substrate to cleave up to about 3% of the polyamic acid molecules; and an electrolessly applied metal layer disposed on said imidized layer.

Claim 13

Dependent Claim 76 words

An article comprising: a substrate; an imidized layer of a reaction product of a partially fluorinated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water added to said polyamic acid about 5 minutes to about 8 hours before application of said imidized layer to a surface of said substrate to cleave up to about 3% of the polyamic acid molecules; and an electrolessly applied metal layer disposed on said imidized layer.

Claim 14

Dependent Claim 13 words

An article of claim 11 wherein said metal layer is copper or nickel.

Claim 15

Dependent Claim 101 words

An EMI shielded enclosure for electrical components comprising: a housing having walls with an inner surface and an outer surface wherein said inner and outer surfaces of said walls have disposed thereon an imidized layer of a reaction product of a halogenated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water added to said polyamic acid about 5 minutes to about 8 hours before application of said imidized layer to said walls to cleave up to about 3% of the polyamic acid molecules; and at least one metal layer disposed on surfaces of said imidized layer.

Claim 16

Dependent Claim 101 words

An EMI shielded enclosure for electrical components comprising: a housing having walls with an inner surface and an outer surface wherein said inner and outer surfaces of said walls have disposed thereon an imidized layer of a reaction product of a halogenated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water added to said polyamic acid about 5 minutes to about 8 hours before application of said imidized layer to said walls to cleave up to about 3% of the polyamic acid molecules; and at least one metal layer disposed on surfaces of said imidized layer.

Claim 17

Dependent Claim 43 words

The enclosure of claim 13 wherein said metal layers comprises. an electrolessly applied first metal layer disposed on said surfaces of said imidized layer; and an electrolytically applied or an electrolessly applied second metal layer disposed on top of said first metal layer.

Claim 18

Dependent Claim 12 words

The enclosure of claim 14 wherein said first metal layer is copper.

Claim 19

Dependent Claim 12 words

The enclosure of claim 14 wherein said second metal layer is nickel.

Claim 20

Dependent Claim 18 words

The enclosure of claim 14 wherein said metal layers are disposed on said inner surface of said wall.

Claim 21

Dependent Claim 28 words

The enclosure of claim 14 wherein thicknesses of said metal layers are adjusted to reduce said intensity of electronic noise emanating from said enclosure to a desired level.

Claim 22

Dependent Claim 87 words

An insulated mold surface of a cavity or a core of a mold comprising: an imidized layer of a reaction product of a halogenated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water added to said polyamic acid about 5 minutes to about 8 hours before application of said imidized layer to the surface of said cavity or said core to cleave up to about 3% of the polyamic acid molecules; and at least one metal layer disposed on said imidized layer.

Claim 23

Dependent Claim 87 words

An insulated mold surface of a cavity or a core of a mold comprising: an imidized layer of a reaction product of a halogenated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water added to said polyamic acid about 5 minutes to about 8 hours before application of said imidized layer to the surface of said cavity or said core to cleave up to about 3% of the polyamic acid molecules; and at least one metal layer disposed on said imidized layer.

Claim 24

Dependent Claim 61 words

The insulated mold surface of claim 19 wherein said metal layer comprises; an electrolessly applied first layer of nickel disposed on said imidized layer; an electrolytically applied or an electrolessly applied second layer of copper disposed on top of said first layer; and an electrolytically applied or an electrolessly applied third layer of nickel disposed on top of said second layer.

Claim 25

Dependent Claim 112 words

A metallized halogenated polyamide layer prepared by the method comprising: reacting a halogenated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water to cleave up to about 3% of the polyamic acid molecules, thereby forming a reaction product; applying a coating of said reaction product to a surface of a substrate about 5 minutes to about 8 hours after addition of said water to said polyamic acid; curing said reaction product into a layer of said halogenated polyimide; treating the surface of said halogenated polyimide layer with a degreasing agent; treating said degreased surface with an oxidizing agent; and applying a layer of metal on said surface.

Claim 26

Dependent Claim 112 words

A metallized halogenated polyamide layer prepared by the method comprising: reacting a halogenated polyamic acid with about 0.1-14% by weight, based on said polyamic acid, of water to cleave up to about 3% of the polyamic acid molecules, thereby forming a reaction product; applying a coating of said reaction product to a surface of a substrate about 5 minutes to about 8 hours after addition of said water to said polyamic acid; curing said reaction product into a layer of said halogenated polyimide; treating the surface of said halogenated polyimide layer with a degreasing agent; treating said degreased surface with an oxidizing agent; and applying a layer of metal on said surface.

Claim 27

Dependent Claim 36 words

The halogenated polyimide layer of claim 21 wherein said halogenated polyamic acid comprises the following structure: ##STR8## where n is an integer sufficient to provide a structure having an average molecular weight of at least 5000.

Claim 28

Dependent Claim 36 words

The halogenated polyimide layer of claim 21 wherein said halogenated polyamic acid comprises the following structure: ##STR9## where n is an integer sufficient to provide a structure having an average molecular weight of at least 5000.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-04-11	1997-10-11	1998-04-12	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-04-11	2001-10-11	2002-04-12	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-04-11	2005-10-11	2006-04-12	$7700.00	Window Closed / Lapsed

Halogenated polyimide composition having improved adhesion characteristic and articles obtained therefrom

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