| (19) |
 |
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(11) |
EP 0 143 660 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
29.01.1986 Bulletin 1986/05 |
| (43) |
Date of publication A2: |
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05.06.1985 Bulletin 1985/23 |
| (22) |
Date of filing: 29.11.1984 |
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| (84) |
Designated Contracting States: |
|
AT BE CH DE FR GB IT LI LU NL SE |
| (30) |
Priority: |
01.12.1983 US 556840
|
| (71) |
Applicant: ELECTRO MATERIALS CORP. OF AMERICA |
|
() |
|
| (72) |
Inventors: |
|
- Martin, Frank Wayne
()
- Shahbazi, Samson
()
|
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| |
|
| (54) |
Resistors, methods of forming said resistors, and articles comprising said resistors |
(57) This invention concerns resistor compositions, methods of forming such resistor compositions,
and articles comprising a substrate carrying such resistor compositions.
The resistor compositions of the invention comprise carbon particles embedded in a
matrix formed from short chain-length phenolic resin, long chain-length phenolic resin,
epoxy and, optionally filler.
The resistor compositions of the invention can be formed by mixing short chain-length
phenolic resin, long chain-length phenolic resin, solvent, and, if present, filler
with carbon particles to form a solution which is then mixed with the epoxy to form
an ink. The ink is applied to a substrate to form a film thereon which is cured to
evaporate solvent and to allow polymerization to occur thereby leaving the resistor
composition on the substrate.