Invention Grant
- Patent Title: Method and apparatus for inspection of light emitting semiconductor devices using photoluminescence imaging
-
Application No.: US13577518Application Date: 2012-06-18
-
Publication No.: US09638741B2Publication Date: 2017-05-02
- Inventor: Steven Boeykens , Tom Marivoet
- Applicant: Steven Boeykens , Tom Marivoet
- Applicant Address: US CA Milpitas
- Assignee: KLA-Tencor Corporation
- Current Assignee: KLA-Tencor Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Suiter Swantz pc llo
- International Application: PCT/IB2012/053052 WO 20120618
- International Announcement: WO2012/176106 WO 20121227
- Main IPC: G01R31/265
- IPC: G01R31/265 ; G01N21/64 ; H01L33/00 ; G01R31/26

Abstract:
A method and apparatus for the inspection of light emitting semiconductor devices. The semiconductor device is illuminated with a light source, wherein at least an area of the light emitting semiconductor is illuminated with a waveband of light. The waveband of light λA+λB can generate electron-hole pairs in the light emitting semiconductor to be inspected. Through an objective lens at least a part of the light λC emitted by the light emitting semiconductor is detected. The emitted light is captured with a sensor of a camera that is sensitive to wavelengths of the emitted light, wherein the wavelength of the emitted light is above the width of the waveband. The data of the emitted light, captured with the sensor, are transmitted to a computer system for calculating inspection results of the light emitting semiconductor.
Public/Granted literature
Information query