EP0281312A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Textured polyimide film
Assignee: Polyonics Corp
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Filing: 1988-02-24
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Granted: —
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Expires: 2008-02-24
Abstract
Abstract One or both surfaces of a polyimide sheet are uniformly and completely textured by treatment with a one-phase solution of a diamine, an alkali metal hydroxide and a water miscible alcohol in water. The textured sheet can be coated with a layer of electroless applied copper, yielding an adhesiveless laminate useful in the production of electronic circuitry.
Inventors
- 👤 Daniel Patrick Walsh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 03:28
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/22; H; H05; H05K; H05K3/00; H05K3/38; H05K3/381; H05K2203/00; H05K2203/12; H05K2203/122; Y; Y10; Y10S; Y10S205/00; Y10S205/924; Y10S205/926
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A process for texturing a surface of a polyimide sheet which comprises contacting said sheet with a one-phase solution comprising between about 3 and 15 percent by weight of an amine of the formula H₂N(CH₂)nNH₂ wherein n is an integer from 2 to 6, 15 and 40 percent by weight of an alkali metal hydroxide, between about 10 and 50 percent by weight of a water miscible alcohol, with the remainder of the mixture being water at a temperature and for a time sufficient to render said surface textured uniformly and substantially completely.
Claim 2
Dependent Claim
93 words
A process for texturing a surface of a polyimide sheet which comprises contacting said sheet with a one-phase solution comprising between about 3 and 15 percent by weight of an amine of the formula H₂N(CH₂)nNH₂ wherein n is an integer from 2 to 6, 15 and 40 percent by weight of an alkali metal hydroxide, between about 10 and 50 percent by weight of a water miscible alcohol, with the remainder of the mixture being water at a temperature and for a time sufficient to render said surface textured uniformly and substantially completely.
Claim 3
Dependent Claim
11 words
A process according to claim 1 wherein said amine is ethylene-diamine.
Claim 4
Dependent Claim
27 words
A process according to claim 1 or 2 wherein said alkali metal hydroxide is potassium hydroxide or sodium hydroxide, or a mixture of potassium and sodium hydroxide.
Claim 5
Dependent Claim
37 words
A process according to any one of claims 1, 2 or 3 wherein said alcohol is methanol, ethanol, isopropanol, or n-propanol, or is a mixture of at least two alcohols selected from methanol, ethanol, isopropanol and n-propanol.
Claim 6
Dependent Claim
35 words
A polyimide film having a surface which is uniformly and substantially completely textured and characterised by a nodular or bumped appearance and having mechanical properties substantially the same as said film prior to being textured.
Claim 7
Dependent Claim
35 words
A polyimide film having a surface which is uniformly and substantially completely textured and characterised by a nodular or bumped appearance and having mechanical properties substantially the same as said film prior to being textured.
References Cited (Backward Citations)
No citation records indexed.
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