Invention Grant
- Patent Title: Single ultra-planar wafer table structure for both wafers and film frames
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Application No.: US14424275Application Date: 2013-09-02
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Publication No.: US10312124B2Publication Date: 2019-06-04
- Inventor: Jian Ping Jin , Leng Kheam Lee
- Applicant: SEMICONDUCTOR TECHNOLOGIES & INSTRUMENTS PTE LTD
- Applicant Address: SG Singapore
- Assignee: SEMICONDUCTOR TECHNOLOGIES & INSTRUMENTS PTE LTD
- Current Assignee: SEMICONDUCTOR TECHNOLOGIES & INSTRUMENTS PTE LTD
- Current Assignee Address: SG Singapore
- Agency: Horizon IP Pte Ltd.
- International Application: PCT/SG2013/000381 WO 20130902
- International Announcement: WO2014/035346 WO 20140306
- Main IPC: B25B27/14
- IPC: B25B27/14 ; H01L21/68 ; H01L21/683 ; B25J11/00 ; B25J15/06 ; H01L21/677 ; G01B11/27 ; G01N21/95 ; H01L21/687 ; H01L21/67

Abstract:
A wafer table structure providing a single wafer table surface suitable for handling both wafers and film frames includes a base tray having a set of compartments formed therein by way of a set of ridges formed in or on an interior base tray surface; a hardenable fluid permeable compartment material disposed within the set of base tray compartments; and a set of openings formed in the base tray interior surface by which the hardened compartment material is exposable to negative or positive pressures. The base tray includes a first ceramic material (e.g., porcelain), and the hardenable compartment material includes a second ceramic material. The base tray and the compartment material are simultaneously machinable by way of a standard machining process to thereby planarize exposed outer surfaces of the base tray and the hardened compartment material at an essentially identical rate for forming a highly or ultra-planar wafer table surface.
Public/Granted literature
- US20150214090A1 SINGLE ULTRA-PLANAR WAFER TABLE STRUCTURE FOR BOTH WAFERS AND FILM FRAMES Public/Granted day:2015-07-30
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