US5294828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate for supporting a punched leadframe
Assignee: Rohm Co Ltd
•
Filing: 1993-03-12
•
Granted: 1994-03-15
•
Expires: 2013-03-12
Abstract
Abstract A leadframe support plate, particularly a heater plate, for a wire bonding apparatus comprises a frame supporting face, and a die-pad supporting face for supporting a die pad of a leadframe. The die-pad supporting face is formed with at least one burr receiving groove extending along the marginal contour of the die pad, so that the die pad of the leadframe is supported stably on the die-pad supporting face even if the marginal of the die pad has burrs.
Inventors
- 👤 Hiroshi Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:29
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/002; B23K20/004; B23K20/005; B23K20/007; B23K20/10; H; H10; H10W; H10W72/00; H10W72/071; H10W72/0711; H10W72/07141; H10W72/075; H10W72/07521; H10W72/07531; H10W72/07532; H10W72/07533; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524; H10W90/00; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A leadframe support plate for directly supporting a punched leadframe at the time of wire bonding, the support plate comprising a frame supporting face, and a die-pad supporting face for supporting a die pad of the leadframe, the die pad having marginal burrs along a marginal contour of the die pad, wherein the die-pad supporting face is formed with at least one burr receiving groove extending along the marginal contour of the die pad for receiving the marginal burrs.
Claim 2
Dependent Claim
79 words
A leadframe support plate for directly supporting a punched leadframe at the time of wire bonding, the support plate comprising a frame supporting face, and a die-pad supporting face for supporting a die pad of the leadframe, the die pad having marginal burrs along a marginal contour of the die pad, wherein the die-pad supporting face is formed with at least one burr receiving groove extending along the marginal contour of the die pad for receiving the marginal burrs.
Claim 3
Dependent Claim
34 words
The leadframe support plate according to claim 1, further comprising a die-pad receiving recess surrounded by the frame supporting face, the die-pad receiving recess has a bottom face serving as the die-pad supporting face.
Claim 4
Dependent Claim
22 words
The leadframe support plate according to claim 2, wherein the die-pad receiving recess has side walls spaced from the burr receiving groove.
Claim 5
Dependent Claim
22 words
The leadframe support plate according to claim 2, wherein the die-pad receiving recess has side walls partially defining the burr receiving groove.
Claim 6
Dependent Claim
32 words
The leadframe support plate according to claim 1, wherein the die-pad supporting face is formed with a plurality of burr receiving grooves which are differently sized to be arranged one within another.
Claim 7
Dependent Claim
83 words
A heater plate for directly supporting a punched leadframe at the time of wire bonding while also heating the leadframe, the heater plate comprising a frame supporting face, and a die-pad supporting face for supporting a die pad of the leadframe, the die pad having marginal burrs along a marginal contour of the die pad, wherein the die-pad supporting face is formed with at least one burr receiving groove extending along the marginal contour of the die pad for receiving the marginal burrs.
Claim 8
Dependent Claim
83 words
A heater plate for directly supporting a punched leadframe at the time of wire bonding while also heating the leadframe, the heater plate comprising a frame supporting face, and a die-pad supporting face for supporting a die pad of the leadframe, the die pad having marginal burrs along a marginal contour of the die pad, wherein the die-pad supporting face is formed with at least one burr receiving groove extending along the marginal contour of the die pad for receiving the marginal burrs.
References Cited (Backward Citations)
JPS5994853A
Cited
US5175060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-14 | 1997-09-13 | 1998-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-14 | 2001-09-13 | 2002-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-14 | 2005-09-13 | 2006-03-15 | $7700.00 | Window Closed / Lapsed |