US 11,705,539 B2
Optoelectronic device with transparent insulated current blocking region and uniform current spreading
Tzung-Shiun Yeh, Hsinchu (TW); Li-Ming Chang, Hsinchu (TW); and Chien-Fu Shen, Hsinchu (TW)
Assigned to EPISTAR CORPORATION, Hsinchu (TW)
Filed by EPISTAR CORPORATION, Hsinchu (TW)
Filed on Dec. 29, 2020, as Appl. No. 17/136,714.
Application 17/136,714 is a continuation of application No. 16/893,342, filed on Jun. 4, 2020, granted, now 10,910,520.
Application 16/893,342 is a continuation of application No. 16/592,428, filed on Oct. 3, 2019, granted, now 10,707,376, issued on Jul. 7, 2020.
Application 16/592,428 is a continuation of application No. 15/889,888, filed on Feb. 6, 2018, granted, now 10,475,962, issued on Nov. 12, 2019.
Claims priority of provisional application 62/459,102, filed on Feb. 15, 2017.
Prior Publication US 2021/0119084 A1, Apr. 22, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 33/36 (2010.01); H01L 33/62 (2010.01); H01L 33/38 (2010.01); H01L 33/14 (2010.01); H01L 33/20 (2010.01)
CPC H01L 33/36 (2013.01) [H01L 33/38 (2013.01); H01L 33/62 (2013.01); H01L 33/14 (2013.01); H01L 33/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optoelectronic device, comprising:
a semiconductor stack, comprising a top surface;
a current blocking region, comprising a first pad portion formed on the semiconductor stack and wherein the current blocking region comprises transparent insulated material;
a first opening, formed in the first pad portion, exposing the top surface of the semiconductor stack;
a transparent conductive layer, covering the top surface of the semiconductor stack, comprising a second opening overlapping the first opening; and
a first electrode, formed on the semiconductor stack, comprising a first pad electrode formed above the first pad portion of the current blocking region;
wherein the first pad electrode contacts the semiconductor stack through the first opening and the second opening; and
wherein the first opening comprises a first area, the first pad portion and the first opening compose a total area, and a ratio of the first area to the total area is between 10% and 40%.