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:
May. 23, 2006
Filed:
Jul. 20, 2004
Tue Nguyen, Fremont, CA (US);
Craig Alan Bercaw, Los Gatos, CA (US);
Tue Nguyen, Fremont, CA (US);
Craig Alan Bercaw, Los Gatos, CA (US);
Tegal Corporation, Petaluma, CA (US);
Abstract
A deposition shield partially covering a substrate and having two zones of different thermal properties can provide minimal deposition on the shield together with minimal heat loss due to substrate contact. A zone of low thermal transmittivity is contact shielding the substrate, and due to the low thermal transmittivity property, there is minimal heat loss of the heated substrate, resulting in a more uniform temperature profile and a more uniform film deposition. A zone of high thermal transmittivity is in the rest of the shield, allowing thermal energy from the heated substrate to transmit through, resulting in a cooler shield and minimal deposition on the shield.