US5111364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact resistant layer for a circuit board
Assignee: Brother Industries Ltd
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Filing: 1990-08-30
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Granted: 1992-05-05
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Expires: 2010-08-30
Abstract
Abstract A resist film for protecting a circuit pattern is coated onto a circuit pattern formed on a circuit board, and further, a part of the resist film with which another unit comes into contact is coated with a thermosetting film. Namely, the other unit is brought into contact with a part of the circuit pattern coated with the thermosetting film, and thus, the other unit and the resist film do not come into contact with each other directly, regardless of whether or not the other unit has a high temperature.
Inventors
- 👤 Satoshi Yoshimoto
- 👤 Shigeru Nakata
- 👤 Noboru Takama
- 👤 Minoru Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:19
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H01H2207/00; H01H2207/04; H01H2207/044; H01H2215/00; H01H2215/004; H01H2215/012; H05K1/00; H05K1/02; H05K1/03; H05K1/0393; H05K2201/00; H05K2201/01; H05K2201/0183; H05K2201/0195; H05K2201/09; H05K2201/09818; H05K2201/09909; H05K2201/10; H05K2201/10007; H05K2201/10053; H05K2203/00; H05K2203/05; H05K2203/0562; H05K2203/0577; H05K2203/0588; H05K3/40; H05K3/4007
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A circuit board comprising: a base film; a circuit pattern formed on the base film; a resist layer coated on the circuit pattern for protecting the circuit pattern; and an exterior thermosetting layer coated on at least a portion of the resist layer, the thermosetting layer having an interior surface contacting the resist layer and an exterior surface exposed over the entire thermosetting layer for protecting the underlying resist layer and circuit pattern layer from wear.
Claim 2
Dependent Claim
76 words
A circuit board comprising: a base film; a circuit pattern formed on the base film; a resist layer coated on the circuit pattern for protecting the circuit pattern; and an exterior thermosetting layer coated on at least a portion of the resist layer, the thermosetting layer having an interior surface contacting the resist layer and an exterior surface exposed over the entire thermosetting layer for protecting the underlying resist layer and circuit pattern layer from wear.
Claim 3
Dependent Claim
14 words
A circuit board as in claim 1 wherein the thermosetting material is a silicone.
Claim 4
Dependent Claim
15 words
A circuit board as in claim 1 wherein the resist layer is an acrylic resin.
Claim 5
Dependent Claim
19 words
A circuit board as in claim 1, wherein the base film is flexible and said thermosetting layer is flexible.
Claim 6
Dependent Claim
125 words
An electronic control element comprising: an intermediate housing comprising a top cover and an intermediate base plate; a circuit board within said intermediate housing, said circuit board comprising: a base film; a circuit pattern formed on the base film; a layer of resist material on the base film overlying the circuit pattern; and an exterior layer of thermosetting material on at least a portion of the resist layer for protecting the underlying layers from wear, the thermosetting layer having an interior surface contacting the resist layer and an exterior surface exposed over the entire thermosetting layer; means on the housing for engaging said circuit board; and said thermosetting material being disposed on portions of the resist layer where the engaging means engages said circuit board.
Claim 7
Dependent Claim
125 words
An electronic control element comprising: an intermediate housing comprising a top cover and an intermediate base plate; a circuit board within said intermediate housing, said circuit board comprising: a base film; a circuit pattern formed on the base film; a layer of resist material on the base film overlying the circuit pattern; and an exterior layer of thermosetting material on at least a portion of the resist layer for protecting the underlying layers from wear, the thermosetting layer having an interior surface contacting the resist layer and an exterior surface exposed over the entire thermosetting layer; means on the housing for engaging said circuit board; and said thermosetting material being disposed on portions of the resist layer where the engaging means engages said circuit board.
Claim 8
Dependent Claim
13 words
Apparatus as in claim 5, wherein the thermosetting material is a flexible silicone.
Claim 9
Dependent Claim
13 words
Apparatus as in claim 6, wherein the resist material is an acrylic resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-05 | 1995-11-04 | 1996-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-05 | 1999-11-04 | 2000-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-05 | 2003-11-04 | 2004-05-05 | $7700.00 | Window Closed / Lapsed |