Invention Grant
- Patent Title: Semiconductor die singulation using a sacrificial bonding material layer and an anisotropic channel etch
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Application No.: US16248923Application Date: 2019-01-16
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Publication No.: US10854573B2Publication Date: 2020-12-01
- Inventor: Zhongli Ji , Ning Ye , Tong Zhang , Hem Takiar , Yangming Liu
- Applicant: SANDISK TECHNOLOGIES LLC
- Applicant Address: US TX Addison
- Assignee: SANDISK TECHNOLOGIES LLC
- Current Assignee: SANDISK TECHNOLOGIES LLC
- Current Assignee Address: US TX Addison
- Agency: The Marbury Law Group, PLLC
- Priority: CN201910019750 20190109
- Main IPC: H01L21/00
- IPC: H01L21/00 ; H01L23/00 ; H01L23/31 ; H01L27/11582 ; H01L21/306 ; H01L21/822 ; H01L21/768 ; H01L27/1157

Abstract:
A substrate semiconductor layer is attached to a carrier substrate through a sacrificial bonding material layer. A plurality of semiconductor dies included within continuous material layers are formed on a front side of the substrate semiconductor layer. Each of the continuous material layers continuously extends over areas of the plurality of semiconductor dies. A plurality of dicing channels is formed between neighboring pairs among the plurality of semiconductor dies by anisotropically etching portions of the continuous material layers located between neighboring pairs of semiconductor dies. The plurality of dicing channels extends to a top surface of the sacrificial bonding material layer. The sacrificial bonding material layer is removed selective to materials of surface portions of the plurality of semiconductor dies using an isotropic etch process. The plurality of semiconductor dies is singulated from one another upon removal of the sacrificial bonding material layer.
Public/Granted literature
- US20200219842A1 SEMICONDUCTOR DIE SINGULATION USING A SACRIFICIAL BONDING MATERIAL LAYER AND AN ANISOTROPIC CHANNEL ETCH Public/Granted day:2020-07-09
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