| 发明名称 |
METHOD OF SELECTIVELY PROVIDING QUANTUM WELL IN FLIP CHIP LIGHT EMITTING DIODE FOR IMPROVING LIGHT EXTRACTION |
| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase extraction efficiency to increase the total integrated flux generated by an LED. <P>SOLUTION: An appropriate space from an active region to a reflective ohmic contact is selected to improve the light extraction from the upside of an LED. By selecting the appropriate space from the active region to the reflective ohmic contact, interference fringes of upwards guided lights are concentrated into an escape cone. The appropriate space is approximately λ<SB>n</SB>/4 in ranges defined by 2.3λ<SB>n</SB>/4≤d≤3.1λ<SB>n</SB>/4 (preferably about 2.6λ<SB>n</SB>/4) and 4.0λ<SB>n</SB>/4≤d≤4.9λ<SB>n</SB>/4 (preferably about 4.5λ<SB>n</SB>/4). Thus, the light extraction is improved. <P>COPYRIGHT: (C)2003,JPO |
| 申请公布号 |
JP2003179255(A) |
申请公布日期 |
2003.06.27 |
| 申请号 |
JP20020297409 |
申请日期 |
2002.10.10 |
| 申请人 |
LUMILEDS LIGHTING US LLC |
发明人 |
LUDOWISE MICHAEL J;SHEN YU-CHEN;KRAMES MICHAEL R |
| 分类号 |
H01L27/15;H01L33/02;H01L33/38;H01L33/40;H01L33/44;H01L33/62;H01L33/64 |
主分类号 |
H01L27/15 |
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