Invention Grant
- Patent Title: Thin film structures and devices with integrated light and heat blocking layers for laser patterning
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Application No.: US14673151Application Date: 2015-03-30
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Publication No.: US09240508B2Publication Date: 2016-01-19
- Inventor: Daoying Song , Chong Jiang , Byung-Sung Leo Kwak , Joseph G. Gordon, II
- Applicant: APPLIED MATERIALS, INC.
- Applicant Address: US CA Santa Clara
- Assignee: Applied Materials, Inc.
- Current Assignee: Applied Materials, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Pillsbury Winthrop Shaw Pittman LLP
- Main IPC: H01L21/302
- IPC: H01L21/302 ; H01L21/461 ; H01L31/0463 ; H01L31/024 ; H01L31/0216

Abstract:
Selective removal of specified layers of thin film structures and devices, such as solar cells, electrochromics, and thin film batteries, by laser direct patterning is achieved by including heat and light blocking layers in the device/structure stack immediately adjacent to the specified layers which are to be removed by laser ablation. The light blocking layer is a layer of metal that absorbs or reflects a portion of the laser energy penetrating through the dielectric/semiconductor layers and the heat blocking layer is a conductive layer with thermal diffusivity low enough to reduce heat flow into underlying metal layer(s), such that the temperature of the underlying metal layer(s) does not reach the melting temperature, Tm, or in some embodiments does not reach (Tm)/3, of the underlying metal layer(s) during laser direct patterning.
Public/Granted literature
- US20150364629A1 THIN FILM STRUCTURES AND DEVICES WITH INTEGRATED LIGHT AND HEAT BLOCKING LAYERS FOR LASER PATTERNING Public/Granted day:2015-12-17
Information query
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