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. 11, 1999
Filed:
May. 12, 1998
Lung-Tai Chen, Hsinchu, TW;
Ping-Huang Chiang, Hsinchu, TW;
Yu-Kon Chou, Taipei, TW;
Chien-Chi Chao, Taipei, TW;
Industrial Technology Research Institute, Hsinchu Hsien, TW;
Abstract
The present invention includes a substrate having a first opening. A heat spreader is attached on the bottom surface of the substrate. The bottom side surface of the heat spreader has trench pattern. The trench pattern includes a plurality of connecting cavities and a plurality of trenches. The chip is mounted on the top side surface of the heat spreader. A supporting member is formed on the top side surface of the substrate. The space among the substrate, the chip, the heat spreader and the supporting member is encapsulated by encapsulating material. The preformed solder balls are mounted on the bottom side surface of the substrate.