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.:
Date of Patent:
Feb. 12, 2019
Filed:
Dec. 10, 2015
Applicant:
Agc Inc., Chiyoda-ku, JP;
Inventor:
Motoshi Ono, Chiyoda-Ku, JP;
Assignee:
AGC Inc., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03B 33/10 (2006.01); C03C 23/00 (2006.01); B23K 9/013 (2006.01); B23K 26/382 (2014.01); B26F 1/28 (2006.01); B23K 26/384 (2014.01); B23K 103/00 (2006.01);
U.S. Cl.
CPC ...
B23K 9/013 (2013.01); B23K 26/382 (2015.10); B23K 26/384 (2015.10); B26F 1/28 (2013.01); B23K 2103/50 (2018.08); B23K 2103/54 (2018.08);
Abstract
Disclosed is a through-hole forming method including a process of forming, by condensing and irradiating a laser beam onto an insulation substrate through a lens, a through-hole that passes through the insulation substrate in a thickness direction of the insulation substrate. A medium between the lens and the insulation substrate is air. A converging half angle θ that is calculated from a focal length f of the lens and a beam diameter d of the laser beam that enters the lens by using expression (1) satisfies expression (2):(/2)/=tan θ  (1), and0.16≤sin θ≤0.22  (2).