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:
Nov. 29, 2011
Filed:
Nov. 14, 2008
Nobumasa Nishiyama, Kanagawa, JP;
Ryo Yoshida, Kanagawa, JP;
Haruhide Takahashi, Kanagawa, JP;
Shinobu Hagiya, Kanagawa, JP;
Toshiki Hirano, San Jose, CA (US);
Nobumasa Nishiyama, Kanagawa, JP;
Ryo Yoshida, Kanagawa, JP;
Haruhide Takahashi, Kanagawa, JP;
Shinobu Hagiya, Kanagawa, JP;
Toshiki Hirano, San Jose, CA (US);
Abstract
Embodiments of the present invention relate to approaches to effectively let noise on a head slider bonded to a silicon substrate of a microactuator, escape to the ground. A head gimbal assembly (HGA) according to an embodiment of the present invention comprises a microactuator bonded to a gimbal tongue. The microactuator comprises a piezoelectric element and a movable part for moving in response to expansion or contraction of the piezoelectric element. The motion of the movable part causes a head slider to slightly move. The microactuator further comprises a conductive path including an impurity-containing silicon layer formed on the silicon substrate. The conductive path transmits electric charge of the head slider to a suspension. The conductivity of the impurity-containing silicon layer is lower than the one of the silicon substrate so that the noise charge of the head slider may escape to the suspension.