EP0321083A3
Composite polymer/desiccant coatings for ic encapsulation
Abstract
This invention is directed to composite coating for maintaining low moisture levels at the surface of solid substrates. One embodiment of the invention comprises a coating having a desiccant layer between layers of the same or different elastomeric polymers. Another embodiment comprises a layer of elastomeric polymer covered with a layer of an elastomeric polymer/desiccant mixture. The composite coating may be applied to integrated circuits to prevent corrosion thereof.
Term
Term ended
Projected expiry passed 4 November 2008, 17.9 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
Every citation, both ways
| Document | Relation | Office | Category | Cited during |
|---|---|---|---|---|
| US4081397A | Cites | United States of America | AD | Search report |
| PATENT ABSTRACTS OF JAPAN, vol. 10, no. 236 (E-428)[2292], 15th August 1986; & JP-A-61 67 246 (NEC CORP.) 07-04-1986 | Non-patent | – | – | Search report |
| PATENT ABSTRACTS OF JAPAN, vol. 11, no. 390 (E-567)[2837], 19th December 1987; & JP-A-62 155 542 (NEC CORP.) 10-07-1987 | Non-patent | – | – | Search report |
| PATENT ABSTRACTS OF JAPAN, vol. 8, no. 107 (E-245)[1544], 19th May 1984; & JP-A-59 23 550 (NIPPON DENKI K.K.) 07-02-1984 | Non-patent | – | – | Search report |
| PATENT ABSTRACTS OF JAPAN, vol. 8, no. 256 (E-280)[1693], 22nd November 1984; & JP-A-59 129 447 (NIPPON DENKI K.K.) 25-07-1984 | Non-patent | – | – | Search report |
| PATENT ABSTRACTS OF JAPAN, vol. 10, no. 35 (E-380)[2092], 12th February 1986; & JP-A-60 192 353 (NIPPON DENKI K.K.) 30-09-1985 | Non-patent | – | – | Search report |
7 members in 3 offices; this record represents the family
Priority claims2
| Document | Office | Kind | Date |
|---|---|---|---|
| 133820 | United States of America | – | |
| 13382087 | United States of America | A |
Members7
| Document | Office | Kind | |
|---|---|---|---|
| EP0321083A2 | European Patent Office (EPO) | A2 | |
| JPH022002A | Japan | A | |
| EP0321083A3This record | European Patent Office (EPO) | A3 | |
| US4939014A | United States of America | A | |
| US4977009A | United States of America | A | |
| US5108784A | United States of America | A | |
| JP2572120B2 | Japan | B2 |
8 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Application refused18R | 18R | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: THE APPLICATION HAS BEEN REFUSEDSTAA | STAA | |
| First examination report despatched17Q | 17Q | |
| Request for examination filed17P | 17P | |
| Designated contracting statesAK | AK | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | |
| Designated contracting statesAK | AK | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI |
Numbers
- Publication
- 0321083
- Application
- 883103871
Titles3
- German
- Zusammengesetzte Schichten aus Polymer/trocknendem Mittel zum Verkapseln von integrierten Schaltungen
- English
- Composite polymer/desiccant coatings for IC encapsulation
- French
- Couches composées de polymère/dessiccant pour l'encapsulation de circuits intégrés
Classification
- CPC, 5
- H10W74/47
- C09D183/04
- Y10T428/24917
- Y10T428/239
- Y10T428/31663
- IPC, 6
- B32B7 02
- B32B9 04
- B32B27 18
- C09D183 04
- H01L23 29
- H01L23 31
Designated states1
- Contracting states, 1
- United Kingdom