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Next generation ALIVH substrate for bare chip direct mounting

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6 Author(s)
Andoh, D. ; Matsushita Electr. Ind. Co. Ltd., Osaka, Japan ; Sugawa, T. ; Nakamura, T. ; Higashitani, H.
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The next generation ALIVH(R) substrate named ALIVH(R)-FB substrate was developed. The ALIVH-FB substrate has a structure that fine layers were formed on the surface of the conventional ALIVH substrate. The design rule of the core layer is Line/Space (LIS)=50/50 μm, Via hole diameter/Land diameter (V/L)=120/250 μm and the rule of fine layer is L/S=25/25 μm, V/L=50/150 μm. Three technologies are developed: thin insulator layer by the film material with high heat resistance; fine via hole drilling process by the YAG THG laser and fine interconnection technology using conductive copper paste; and fine layer fabrication by the transfer process. The technologies display the following features: high wiring density by the Fine Via on Via structure; film insulator with high heat resistance and low CTE for a high reliability joint between the bare chip and the substrate; good impedance control for the high frequency circuit; and a flat surface and high heat resistance for the bare chip mounting. The ALIVH-FB substrate is very suitable for the high pin count bare chip direct mounting

Published in:

Advanced Packaging Materials: Processes, Properties andInterfaces, 2000. Proceedings. International Symposium on

Date of Conference:

2000

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