OPTOELECTRONIC SEMICONDUCTOR CHIP ENCAPSULATED WITH AN ALD LAYER AND CORRESPONDING METHOD OF PRODUCTION

• US 20160005930A1
• Filed: 03/14/2014
• Published: 01/07/2016
• Est. Priority Date: 03/26/2013
• Status: Abandoned Application

• Current Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Original Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Inventors: Engl, Karl, Hartung, Georg, Maute, Markus
• Application Number:
  US14/769,125
• Publication Number:
  US 20160005930A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 2933/0025 relating to coatings
• CPC Class Codes: H01L 2933/005 relating to encapsulations
• CPC Class Codes: H01L 33/382 the electrode extending partially in or entirely through the semiconductor body
• CPC Class Codes: H01L 33/405 Reflective materials
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector
• CPC Class Codes: H01L 33/54 having a particular shape

Abstract

An optoelectronic semiconductor chip includes a semiconductor body including n-conducting and p-conducting regions, an active region generating electromagnetic radiation, a mirror layer reflecting the electromagnetic radiation, and an encapsulating layer sequence formed with an insulating material, wherein the mirror layer is arranged at an underside of the p-conducting region, the active region is arranged at a side of the p-conducting region facing away from the mirror layer, the n-conducting region is arranged at a side of the active region facing away from the p-conducting region, the encapsulation layer sequence covers the semiconductor body at the outer surface thereof in places, the encapsulation layer sequence extends at the outer surface of the semiconductor body from the active region along the p-conducting region as far as below the mirror layer, and the encapsulation layer sequence includes at least one encapsulation layer which is an ALD layer or consists of an ALD layer.

Claims

1-12. -12. (canceled)

13. An optoelectronic semiconductor chip comprising:

a semiconductor body comprising an n-conducting region, an active region that generates electromagnetic radiation, and a p-conducting region;

a first mirror layer that reflects the electromagnetic radiation; and

an encapsulation layer sequence formed with an electrically insulating material, wherein

the first mirror layer is arranged at an underside of the p-conducting region;

the active region is arranged at a side of the p-conducting region facing away from the first mirror layer;

the n-conducting region is arranged at a side of the active region facing away from the p-conducting region;

the encapsulation layer sequence covers the semiconductor body at the outer surface thereof in places;

the encapsulation layer sequence extends at the outer surface of the semiconductor body from the active region along the p-conducting region as far as below the first mirror layer; and

the encapsulation layer sequence comprises at least one encapsulation layer which is an ALD layer or consists of an ALD layer.

14. The optoelectronic semiconductor chip according to claim 13, wherein the encapsulation layer sequence extends along an underside of the first mirror layer facing away from the p-conducting region, and the encapsulation layer sequence covers the first mirror layer at least in places.

15. The optoelectronic semiconductor chip according to claim 13, wherein the encapsulation layer sequence extends along an underside of the first mirror layer facing away from the p-conducting region, and the encapsulation layer sequence completely covers the first mirror layer.

16. The optoelectronic semiconductor chip according to claim 13, further comprising at least one further encapsulation layer which is an ALD layer, wherein the further encapsulation layer completely covers the outer surface of the semiconductor body at least at the n-conducting region.

17. The optoelectronic semiconductor chip according to claim 13, further comprising at least one plated-through hole extending through the p-conducting region and the active region well into the n-conducting region, wherein

the plated-through hole comprises an n-type contact material via which the n-conducting region is electrically contactable, and

the semiconductor body, apart from the at least one plated-through hole, is completely enclosed by the encapsulation layers which are ALD layers.

18. The optoelectronic semiconductor chip according to claim 17, wherein the encapsulation layer sequence directly adjoins the n-type contact material in places.

19. The optoelectronic semiconductor chip according to claim 13, wherein the encapsulation layer and the further encapsulation layer directly contact one another at at least one contact point.

20. The optoelectronic semiconductor chip according to claim 13, further comprising a second mirror layer arranged at an underside of the n-type contact material facing away from the n-conducting region, wherein the encapsulation layer sequence is arranged in places between the first mirror layer and the second mirror layer.

21. The optoelectronic semiconductor chip according to claim 20, wherein the second mirror layer projects beyond the outer surface of the semiconductor body in a lateral direction.

22. The optoelectronic semiconductor chip according to claim 20, wherein the second mirror layer extends below a contact region at least in places, and the second mirror layer is electrically insulated from the contact region and the contact region is provided for the p-side connection of the semiconductor chip from outside the semiconductor chip.

23. The optoelectronic semiconductor chip according to claim 13, wherein the p-conducting region and the first mirror layer are covered by a metallic encapsulation layer in places at their side surfaces, and the encapsulation layer sequence extends between the metallic encapsulation layer and the side surfaces.

24. A method of producing an optoelectronic semiconductor chip according to claim 13 comprising:

providing a growth substrate;

applying the semiconductor body to the growth substrate, wherein the n-conducting region faces the growth substrate and the p-conducting region faces away from the growth substrate;

removing the p-conducting region and the active region in places and exposing the n-conducting region in places;

applying the encapsulation layer sequence on exposed outer surfaces of the p-conducting region, of the active region and of the n-conducting region;

removing the encapsulation layer sequence in places at an underside of the p-conducting region facing away from the n-conducting region, and exposing the p-conducting region in places; and

arranging the first mirror layer on the exposed places of the p-conducting region, wherein applying the encapsulation layer sequence is carried out temporally before arranging the first mirror layer.

26. The optoelectronic semiconductor chip according to claim 13, wherein the encapsulation layer sequence is situated partly in the n-conducting region at the outer surface of the semiconductor body.

25. An optoelectronic semiconductor chip comprising:

a semiconductor body comprising an n-conducting region, an active region that generates electromagnetic radiation, and a p-conducting region;

a first mirror layer that reflects the electromagnetic radiation; and

an encapsulation layer sequence formed with an electrically insulating material, wherein

the first mirror layer is arranged at an underside of the p-conducting region;

the active region is arranged at a side of the p-conducting region facing away from the first mirror layer;

the n-conducting region is arranged at a side of the active region facing away from the p-conducting region;

the encapsulation layer sequence covers the semiconductor body at outer surface thereof in places;

the encapsulation layer sequence extends at the outer surface of the semiconductor body from the active region along the p-conducting region as far as below the first mirror layer;

the encapsulation layer sequence comprises at least one encapsulation layer which is an ALD layer or consists of an ALD layer;

the encapsulation layer sequence is situated partly in the n-conducting region at the outer surface of the semiconductor body and extends along the underside of the first mirror layer facing away from the p-conducting region; and

the encapsulation layer sequence covers the first mirror layer at least in places.

27. A method of producing an optoelectronic semiconductor chip comprising:

providing a growth substrate;

applying a semiconductor body to the growth substrate, wherein a n-conducting region of the semiconductor body faces the growth substrate and a p-conducting region of the semiconductor body faces away from the growth substrate;

removing the p-conducting region and an active region of the semiconductor body in places and exposing the n-conducting region in places;

applying an encapsulation layer sequence on exposed outer surfaces of the p-conducting region, of the active region and of the n-conducting region;

removing the encapsulation layer sequence in places at an underside of the p-conducting region facing away from the n-conducting region, and in the process exposing the p-conducting region in places;

arranging a first mirror layer on the exposed places of the p-conducting region, wherein

applying the encapsulation layer sequence is carried out temporally before arranging the first mirror layer, and

the encapsulation layer sequence comprises at least one encapsulation layer which is an ALD layer or consists of an ALD layer and which is deposited at least in places using ozone as a precursor.