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:
Jul. 08, 2003
Filed:
May. 25, 2000
Zhengda Pan, Newark, CA (US);
Jialuo Jack Xuan, Milpitas, CA (US);
Chung Y. Shih, Cupertino, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A glass-ceramic substrate for magnetic recording media is textured employing a continuous wave laser light beam to uniformly heat a surface zone, thereby forming a continuously roughened zone defined by recrystallized microcrystals. Embodiments include impinging a continuous wave CO laser light beam on a rotating glass-ceramic substrate to uniformly heat an annular zone at a temperature between the crystallization temperature and melting point of the glass-ceramic substrate followed by air cooling to induce a continuous surface roughness having an Ra of about 5 Å to about 20 Å, thereby enabling a glide height of about 0.2 to 0.5 &mgr; in.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile