US5049434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-patterned device substrate device-attach adhesive transfer system
Assignee: National Starch and Chemical Investment Holding Corp
•
Filing: 1984-10-05
•
Granted: 1991-09-17
•
Expires: 2004-10-05
Abstract
Abstract A pre-patterned device substrate device-attach transfer tape is described which allows a one step mounting of adhesive patterns on a device substrate in the desired configuration for later mount of surface mounted devices (e.g., semiconductor dies) thereon. The tape product contains the adhesive pattern in a mirror image to that desired on the exposed surface of the device substrate. The product of the present invention is utilized by bringing the tape product into contact with the device substrate so that the adhesive on the carrier film bonds to the desired surface of the device substrate thereby bringing the adhesive patterns into the desired configuration desired on the device substrate. The use of pressure and, possibly, heat preferentially bonds the adhesive to the device substrate and allows for later stripping of the support film from the support film/adhesive/device substrate composite. This step leaves behind the desired adhesive configuration on the device substrate and allows for later bonding of appropriate surface mounted devices to the device substrate.
Inventors
- 👤 William M. Wasulko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:58
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/70; H10P72/74; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/207; H05K3/30; H05K3/32; H05K3/321; H10W; H10W72/00; H10W72/01; H10W72/011; H10W72/0113; H10W72/013; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H05K1/18; H05K1/181; H05K2203/00; H05K2203/01; H05K2203/0147; H05K2203/0156; H05K2203/03; H05K2203/0338; H10W72/01331; H10W72/01336; H10W72/071; H10W72/073; H10W72/07331; H10W72/07337; H10W72/07338; H10W72/30; H10W72/351; H10W72/353; H10W72/354; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/2486; Y10T428/24893; Y10T428/28; Y10T428/2839
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
67 words
A device substrate device-attach tape which comprises: (a) a support film; and (b) a pattern of conductive adhesive releasably affixed to one side of the support film, the adhesive pattern being of a size and shape so that when brought into contact with a device substrate, the adhesive is in a pattern suitable for later attachment and bonding thereon of surface mounted devices to the device substrate.
Claim 2
Independent Claim
67 words
A device substrate device-attach tape which comprises: (a) a support film; and (b) a pattern of conductive adhesive releasably affixed to one side of the support film, the adhesive pattern being of a size and shape so that when brought into contact with a device substrate, the adhesive is in a pattern suitable for later attachment and bonding thereon of surface mounted devices to the device substrate.
Claim 3
Dependent Claim
18 words
A tape as claimed in claim 1 in which the support film is formed of a polyolefin polymer.
Claim 4
Dependent Claim
13 words
A tape as claimed in claim 1 wherein the support film is polyethylene.
Claim 5
Dependent Claim
23 words
A tape as claimed in claim 1 wherein the support film has a thickness of from about 12 microns to about 250 microns.
Claim 6
Dependent Claim
23 words
A tape as claimed in claim 1 which further comprises a release layer on the film between the support film and the adhesive.
Claim 7
Dependent Claim
15 words
A tape as claimed in claim 5 wherein the release layer comprises a silicone composition.
Claim 8
Dependent Claim
15 words
A tape as claimed in claim 5 wherein the release layer comprises a fluorocarbon composition.
Claim 9
Dependent Claim
23 words
A tape as claimed in claim 1 wherein the conductive adhesive has a thickness of from about 5 microns to about 75 microns.
Claim 10
Dependent Claim
25 words
A tape as claimed in claim 1 wherein the conductive adhesive contains an effective amount for conductivity of a conductive metal in an adhesive matrix.
Claim 11
Dependent Claim
22 words
A tape as claimed in claim 2 wherein the support film has a thickness of about 12 microns to about 250 microns.
Claim 12
Dependent Claim
27 words
A tape as claimed in claim 9 which has a release layer on the film between it and the adhesive, said release layer comprising a silicone composition.
Claim 13
Dependent Claim
41 words
A tape as claimed in claim 11 having a conductive adhesive of a thickness of from about 5 microns to about 75 microns and wherein the adhesive contains an effective amount for conductivity of a conductive metal in an adhesive matrix.
Claim 14
Dependent Claim
19 words
A tape as claimed in claim 1 which also has a release liner over the pattern of conductive adhesive.
Claim 15
Dependent Claim
19 words
A tape as claimed in claim 12 which also has a release liner over the pattern of conductive adhesive.
Claim 16
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 1.
Claim 17
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 2.
Claim 18
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 3.
Claim 19
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 4.
Claim 20
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 5.
Claim 21
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 6.
Claim 22
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 7.
Claim 23
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 8.
Claim 24
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 9.
Claim 25
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 10.
Claim 26
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 11.
Claim 27
Dependent Claim
12 words
In combination, a device substrate and the tape product of claim 12.
References Cited (Backward Citations)
US3059320A
Cited
US3392052A
Cited
US3614832A
Cited
GB1258660A
Cited
US3676252A
Cited
US3703603A
Cited
USRE29820E
Cited
US3950200A
Cited
US3984598A
Cited
US4050976A
Cited
US4242400A
Cited
US4415607A
Cited
JPS59168114A
Cited
US4606962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |