US5567656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for packaging semiconductor device
Assignee: SK Hynix Inc
•
Filing: 1994-12-20
•
Granted: 1996-10-22
•
Expires: 2014-12-20
Abstract
Abstract The process of the present invention is simplified by skipping the die bonding step, the wire bonding step and the trim-forming step of the conventional techniques. A semiconductor device may include: a plurality of bonding pads formed on the surface of the chip for connecting the internal circuit of the chip to an outer circuit; an insulating layer for insulating the surface of the chip, having a height higher than the height of the bonding pads, and formed on the whole surface of the chip except the portions where the bonding pads are formed; a plurality of bumps attached to the bonding pads; a plurality of pad type leads attached to the bumps; and a molding resin for covering the whole surface of the chip except the portions where the leads are disposed.
Inventors
- 👤 Dong-Suck Chun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:24
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/20; H10W40/00; H10W40/70; H10W74/00; H10W74/10; H10W74/111; H10W72/071; H10W72/072; H10W72/07251; H10W72/251; H10W72/50; H10W72/551; H10W72/552; H10W72/90; H10W72/931; H10W72/932; H10W90/00; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
155 words
A process for packaging a semiconductor device, comprising the steps of: (a) forming an insulating layer on a wafer after a wafer fabrication process, wherein the wafer comprises a plurality of chips having bonding pads formed thereon, and removing portions of the insulating layer on portions of the chips where the bonding pads are positioned; (b) cutting the wafer into a plurality of chips; (c) forming a plurality of leads on a lead tape, wherein each of the leads comprises a pad type lead surface adjacent to the lead tape and a bump on a surface facing away from the lead tape, wherein the leads corresponding to the bonding pads of the chips; (d) making connections respectively between the bonding pads of one of the chips and the leads on the lead tape by attaching the bumps of the leads to the corresponding bonding pads of the chip; and (e) molding the chip with resin.
Claim 2
Dependent Claim
155 words
A process for packaging a semiconductor device, comprising the steps of: (a) forming an insulating layer on a wafer after a wafer fabrication process, wherein the wafer comprises a plurality of chips having bonding pads formed thereon, and removing portions of the insulating layer on portions of the chips where the bonding pads are positioned; (b) cutting the wafer into a plurality of chips; (c) forming a plurality of leads on a lead tape, wherein each of the leads comprises a pad type lead surface adjacent to the lead tape and a bump on a surface facing away from the lead tape, wherein the leads corresponding to the bonding pads of the chips; (d) making connections respectively between the bonding pads of one of the chips and the leads on the lead tape by attaching the bumps of the leads to the corresponding bonding pads of the chip; and (e) molding the chip with resin.
Claim 3
Dependent Claim
29 words
The process of claim 1, wherein the molding step is carried out by mounting the chip on a printed circuit board and depositing the resin to cover the chip.
Claim 4
Dependent Claim
37 words
The process of claim 1, wherein the molding step is carried out by encapsulating the chip and the leads with the resin, wherein the pad type lead surface of the leads is not covered by the resin.
Claim 5
Dependent Claim
29 words
The process of claim 1, wherein the insulating layer comprises photo resist, and the removal of portions of the insulating layer comprises exposure and development of the photo resist.
Claim 6
Dependent Claim
12 words
The process of claim 1, wherein the insulating layer comprises polyimide tape.
Claim 7
Dependent Claim
13 words
The process of claim 1, wherein the insulating layer comprises ultra violet tape.
Claim 8
Dependent Claim
31 words
The process of claim 1, further comprising the step of removing the lead tape after the bumps of the leads have been attached to the corresponding bonding pads of the chip.
Claim 9
Dependent Claim
47 words
The process of claim 1, wherein the step of attaching the bumps of the leads to the corresponding bonding pads of the chip comprises matching the leads on the lead tape to the corresponding bonding pads of the chip and applying heat and pressure to the leads.
Claim 10
Dependent Claim
22 words
The process of claim 8, further comprising the step of removing the lead tape after applying heat and pressure to the leads.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-10-22 | 2000-04-22 | 2000-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-22 | 2004-04-22 | 2004-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-22 | 2008-04-22 | 2008-10-22 | $7700.00 | Window Closed / Lapsed |