IDiyas

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9425083 B1

PDFFull Text
Date of Patent:
Aug. 23, 2016

Filed:

Sep. 14, 2015

Handle substrate, composite substrate for semiconductor, and semiconductor circuit board and method for manufacturing the same

Applicant:

Ngk Insulators, Ltd., Aichi-prefecture, JP;

Inventors:

Sugio Miyazawa, Kasugai, JP;

Yasunori Iwasaki, Kitanagoya, JP;

Tatsuro Takagaki, Nagoya, JP;

Akiyoshi Ide, Kasugai, JP;

Hirokazu Nakanishi, Nagoya, JP;

Assignee:

NGK INSULATORS, LTD., Aichi-prefecture, JP;

Attorneys:

Cermak Nakajima & McGowan LLP

Tomoko Nakajima

Primary Examiner:

Stephen W Smoot

Int. Cl.
CPC ...
H01L 21/683 (2006.01); H01L 23/15 (2006.01); H01L 21/762 (2006.01); H01L 27/12 (2006.01); C04B 35/10 (2006.01); C01F 7/02 (2006.01); H01L 21/02 (2006.01); H01L 29/06 (2006.01);
U.S. Cl.
CPC ...
H01L 21/76254 (2013.01); C01F 7/02 (2013.01); C04B 35/10 (2013.01); H01L 21/02002 (2013.01); H01L 21/6835 (2013.01); H01L 23/15 (2013.01); H01L 27/12 (2013.01); H01L 29/06 (2013.01); C01P 2006/60 (2013.01); H01L 2221/68327 (2013.01); H01L 2221/68377 (2013.01); H01L 2221/68381 (2013.01);
Abstract

It is provided a handle substrate of a composite substrate for a semiconductor. The handle substrate is composed of a translucent polycrystalline alumina. A purity of alumina of the translucent polycrystalline alumina is 99.9% or higher, an average of a total forward light transmittance of the translucent polycrystalline alumina is 60% or higher in a wavelength range of 200 to 400 nm, and an average of a linear light transmittance of the translucent polycrystalline alumina is 15% or lower in a wavelength range of 200 to 400 nm.

Find Patent Forward Citations

Loading…