Patent ID: 9252320
Filing Date: 2016-02-02
CPC Classification: H01L,H01M,Y02E,Y02P

Claim Text:
1. A method of laser direct patterning a thin film device by one or more laser beams for selective removal of dielectric and/or semiconductor layers, comprising: providing a thin film device comprising: laser direct patterning said thin film device using a first laser beam, said laser direct patterning removing a laser irradiated portion of said first device layer, wherein said first laser beam passes through said first device layer before reaching said first heat blocking layer, and wherein portions of said first heat blocking layer, said first light blocking layer and said second layer corresponding to said irradiated portion of said first device layer are removed with the removal of said irradiated portion of said first device layer; wherein said first light blocking layer is a layer of metal that absorbs or reflects a portion of the laser energy from a first laser beam penetrating through said first device layer toward said second device layer and said first heat blocking layer is a conductive layer with thermal diffusivity, D, low enough to reduce heat flow into said second device layer from said first device layer such that the temperature of said first device layer reaches the melting temperature, T