Global Patent Index - EP 0806780 B1

EP 0806780 B1 2000-08-02 - Zinc phosphate coating for varistor and method

Title (en)

Zinc phosphate coating for varistor and method

Title (de)

Zink-Phosphatbeschichtung für Varistor und Verfahren zur Herstellung

Title (fr)

Revêtement en phosphate de zinc pour varistor et méthode de fabrication

Publication

EP 0806780 B1 (EN)

Application

EP 96400993 A

Priority

EP 96400993 A

Abstract (en)

[origin: EP0806780A1] A method of providing a semiconductor device (20) with an inorganic electrically insulative layer (34) the device having exposed semiconductor surfaces (34) and electrically conductive metal end terminations (30) in which the device is reacted with phosphoric acid to form a phosphate on the exposed surfaces (34) of the semiconductor but not on the metal end terminations (30), and in which the device is thereafter barrel plated in a conventional electrical barrel plating process and the plating is provided only on the end terminations (30) because the phosphate is not electrically conductive. <IMAGE>

IPC 1-7 (main, further and additional classification)

H01C 1/034; H01C 7/10

IPC 8 full level (invention and additional information)

H01C 1/034 (2006.01); H01C 7/102 (2006.01)

CPC (invention and additional information)

H01C 7/102 (2013.01); H01C 1/034 (2013.01)

Designated contracting state (EPC)

AT BE NL

EPO simple patent family

EP 0806780 A1 19971112; EP 0806780 B1 20000802; AT 195198 T 20000815

INPADOC legal status


2003-02-03 [NLV4] NL: LAPSED OR ANULLED DUE TO NON-PAYMENT OF THE ANNUAL FEE

- Effective date: 20021201

2002-12-01 [PG25 NL] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: NL

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20021201

2002-05-31 [PG25 BE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: BE

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20020531

2002-05-09 [PG25 AT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: AT

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20020509

2001-07-18 [26N] NO OPPOSITION FILED

2001-06-20 [PGFP BE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: BE

- Payment date: 20010620

- Year of fee payment: 6

2001-05-28 [PGFP AT] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: AT

- Payment date: 20010528

- Year of fee payment: 6

2001-05-14 [PGFP NL] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: NL

- Payment date: 20010514

- Year of fee payment: 6

2001-05-01 [NLT2] NL: MODIFICATIONS (OF NAMES), TAKEN FROM THE EUROPEAN PATENT PATENT BULLETIN

- Owner name: LITTELFUSE, INC.

2001-05-01 [NLXE] NL: OTHER COMMUNICATIONS CONCERNING EP-PATENTS (PART 3 HEADING XE)

- Free text: PAT. BUL. 11/2000, PAGE 1524: CORR.: LITTELFUSE, INC

2001-03-28 [RAP2] TRANSFER OF RIGHTS OF AN EP GRANTED PATENT

- Owner name: LITTELFUSE, INC.

2000-12-29 [EN] FR: TRANSLATION NOT FILED

2000-08-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): AT BE NL

2000-08-02 [REF] CORRESPONDS TO:

- Document: AT 195198 T 20000815

2000-06-28 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: LITTLEFUSE, INC.

1999-04-14 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: HARRIS IRELAND DEVELOPMENT COMPANY LIMITED

1998-10-14 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19980828

1998-07-08 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980428

1997-11-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE NL