US5252855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead frame having an anodic oxide film coating
Assignee: Mitsubishi Electric Corp
•
Filing: 1991-10-15
•
Granted: 1993-10-12
•
Expires: 2011-10-15
Abstract
Abstract Lead frames, in which at least one part of the surface of a metal member which is a part of the lead frame is provided with an anodic oxide film of copper or a copper alloy, and in which a member composed substantially of a resin film or a resin plate is connected to the lead frame through this anodic oxide film by gluing or pressing under heat exhibit good adhesion between the metal member and the resin film or plate. Similarly, lead frames constructed with at least two metal members, having a portion of the surface provided with an anodic oxide film of copper or a copper alloy, and in which these metal members are joined together through this anodic oxide film exhibit good adhesion between the metal members.
Inventors
- 👤 Yoshiaki Ogawa
- 👤 Hiroyuki Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:37
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/411; H10W70/413; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/202; H05K3/38; H05K3/382; H05K3/385; H10W72/00; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W72/551; H10W72/552; H10W72/851; H10W72/874; H10W72/884; H10W90/00; H10W90/701; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A lead frame, comprising: (1) a metal member, wherein a portion of a surface of said metal member has an anodic oxide film of a metal selected from the group consisting of copper and a copper alloy; and (2) a member selected from the group consisting of a resin film and a resin plate; wherein said member is connected to said portion of said surface having an anodic oxide film by a process selected from the group consisting of gluing and pressing under heat.
Claim 2
Dependent Claim
84 words
A lead frame, comprising: (1) a metal member, wherein a portion of a surface of said metal member has an anodic oxide film of a metal selected from the group consisting of copper and a copper alloy; and (2) a member selected from the group consisting of a resin film and a resin plate; wherein said member is connected to said portion of said surface having an anodic oxide film by a process selected from the group consisting of gluing and pressing under heat.
Claim 3
Dependent Claim
30 words
The lead frame according to claim 1, wherein said metal member is at least one member selected from the group consisting of copper, copper alloys, and alloys plated with copper.
Claim 4
Dependent Claim
15 words
The lead frame according to claim 1, wherein said resin film is a polyimide film.
Claim 5
Dependent Claim
23 words
The lead frame according to claim 1, wherein said resin plate is a glass/epoxy plate composed of glass fibers and an epoxy resin.
Claim 6
Dependent Claim
74 words
A lead frame comprising at least two metal members, wherein a portion of a surface of each metal member has an anodic oxide film of a metal selected from the group consisting of copper and a copper alloy, and wherein said at least two metal members are joined to each other by a resin type adhesive which is disposed between said portion of a surface of each metal member having an anodic oxide film.
Claim 7
Dependent Claim
74 words
A lead frame comprising at least two metal members, wherein a portion of a surface of each metal member has an anodic oxide film of a metal selected from the group consisting of copper and a copper alloy, and wherein said at least two metal members are joined to each other by a resin type adhesive which is disposed between said portion of a surface of each metal member having an anodic oxide film.
Claim 8
Dependent Claim
30 words
The lead frame according to claim 5, wherein said metal member is at least one member selected from the group consisting of copper, copper alloys, and alloys plated with copper.
References Cited (Backward Citations)
US4248675A
Cited
JPH02113563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-11 | 1997-04-12 | 1997-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-11 | 2001-04-12 | 2001-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-11 | 2005-04-12 | 2005-10-12 | $7700.00 | Window Closed / Lapsed |