Global Patent Index - EP 1163711 A1

EP 1163711 A1 2001-12-19 - ENCAPSULATED OPTOELECTRONIC DEVICES WITH CONTROLLED PROPERTIES

Title (en)

ENCAPSULATED OPTOELECTRONIC DEVICES WITH CONTROLLED PROPERTIES

Title (de)

GEKAPSELTE OPTO-ELEKTRONISCHE VORRICHTUNGEN MIT EINSTELLBAREN EIGENSCHAFTEN

Title (fr)

COMPOSANTS OPTOELECTRONIQUES DANS LEURS CAPSULES POSSEDANT DES PROPRIETES CONTROLEES

Publication

EP 1163711 A1 (EN)

Application

EP 00916636 A

Priority

  • US 0007766 W
  • US 12591699 P
  • US 53144200 A

Abstract (en)

[origin: WO0079659A1] An optoelectronic device, such as a VCSEL, is disclosed whose transmission does not change upon encapsulation by a material such as plastic, epoxy or other suitable encapsulant with a known index of refraction. The surface reflection of the VCSEL surface is very different depending on whether it is terminated in air or the encapsulant, with a much larger reflection in the case of air. It is known that the surface reflection can be made out of phase with the rest of the mirror, effectively increasing the transmission. The amount of the transmission increase can be adjusted by controlling the thickness of the surface layer. Once the VCSEL is encapsulated, the surface reflection is reduced, and the transmission at the facet is increased but the dephased reflection is also reduced. Depositing a surface layer whose index of refraction is similar to the encapsulant, and adjusting the surface layer thickness correctly, the overall transmission from the laser into the terminating material is unchanged, be it air or encapsulation. As a result, the laser properties such as slope efficiency and threshold current are unchanged upon encapsulation. The same procedure may be applied to devices other than VCSELs such as other types of lasers, LEDs, and resonant cavity photodetectors to achieve encapsulated optoelectronic components with controlled properties that remain unchanged upon encapsulation.

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

H01S 5/028; H01L 31/0203; H01L 33/00; H01S 5/022

IPC 8 full level (invention and additional information)

H01L 33/44 (2010.01); H01S 5/022 (2006.01); H01L 33/10 (2010.01); H01L 33/46 (2010.01); H01S 5/028 (2006.01); H01S 5/183 (2006.01)

CPC (invention and additional information)

H01L 33/44 (2013.01); H01S 5/02284 (2013.01); H01L 33/105 (2013.01); H01L 33/465 (2013.01); H01L 2224/48091 (2013.01); H01S 5/0042 (2013.01); H01S 5/02228 (2013.01); H01S 5/02296 (2013.01); H01S 5/0264 (2013.01); H01S 5/0427 (2013.01); H01S 5/18361 (2013.01); H01S 5/18369 (2013.01); H01S 5/18377 (2013.01); H01S 5/18391 (2013.01)

Combination set (CPC)

H01L 2224/48091 + H01L 2924/00014

Citation (search report)

See references of WO 0079659A1

Designated contracting state (EPC)

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

EPO simple patent family

WO 0079659 A1 20001228; EP 1163711 A1 20011219

INPADOC legal status


2004-04-14 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20031001

2002-05-02 [RIN1] INVENTOR (CORRECTION)

- Inventor name: SCOTT, JEFFREY, W.

2002-03-13 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020124

2001-12-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20011003

2001-12-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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