Global patent index - EP 1000182 A2

EP 1000182 A2 2000-05-17 - THIN FILMS

Title (en)

THIN FILMS

Title (de)

DÜNNE FILME

Title (fr)

FILMS MINCES

Publication

EP 1000182 A2 (EN)

Application

EP 98907020 A

Priority

  • GB 9800556 W
  • GB 9703616 A

Abstract (en)

[origin: WO9837254A2] The invention provides a thin film comprising successive layers of aluminium oxide, aluminium oxynitride and aluminium nitride, which varies sinusoidally throughout the depth of the film. The film can be used to coat and protect tools with sharp working edges, to provide a stress free thermal protective coating for natural or man-made diamonds, as a light filter and/or as a pigment. It is made by sputtering aluminium using a suitable noble gas in a variable atmosphere of oxygen and nitrogen at room temperature. The film is transparent and has a refractive index which varies between 1.6 to 2.2, again sinusoidally with depth.

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

C23C 14/00; C23C 14/06; C23C 14/54; G02B 5/28

IPC 8 full level (invention and additional information)

C23C 14/06 (2006.01); C23C 14/54 (2006.01); C23C 16/02 (2006.01); G02B 1/10 (2006.01)

CPC (invention and additional information)

C23C 14/548 (2013.01); C23C 14/0676 (2013.01); C23C 16/0272 (2013.01); G02B 1/10 (2013.01)

Citation (search report)

See references of WO 9837254A3

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9837254 A2 19980827; WO 9837254 A3 19981119; AU 6301198 A 19980909; EP 1000182 A2 20000517; GB 9703616 D0 19970409; ZA 9801447 B 19980827

INPADOC legal status

2003-05-21 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20021008

2002-05-15 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20020327

2000-05-17 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990830

2000-05-17 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE