PRACTICAL AND COST EFFECTIVE SOLUTIONS FOR 3D IC PACKAGINGAuthors: Vern Solberg and Craig Mitchell
Company: Tessera Technologies, Inc.
Date Published: 2/18/2003 Conference: Pan Pacific Symposium
Digital cameras and camcorders, for example, must consider the consumer with ease of use, lighter weight and enhanced performance. Similar considerations must be addressed for cellular phones, pagers, personal communicators, palm top computers, industrial and automotive electronics, personal GPS, medical and diagnostic products. All are viable candidates for more efficient device miniaturization.
The package technology detailed in this paper adapts one and two metal layer, flexible polyimide film substrate materials while enabling the packaging of several die within a single die BGA outline. The package assembly process, employs an innovative stacking methodology that allows the post-package assembly addition of various sub-structures to a base package while retaining a package footprint that is only slightly greater than die. The individual die or die sets added to the stack can be packaged separately and electrically tested before joining, ensuring higher yield and allowing the option of sourcing from multiple silicon vendors.
Key words: BGA, Micro BGA®, µBGA®, µZTM, stacked package, ball stack, folded, fold-over, 3D packaging.
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