| 摘要 |
An integrated circuit assembly is fabricated on a metal substrate strip in an array format that has raised circuitry pattern formed by photolithographic and metal etching processes. The circuitry pattern is formed on one side of the metal substrate only. The raised circuitry's etch depth extends partially through the metal substrate. Die attachment can be performed using a non-conductive material applied directly onto and around the raised circuitry features directly under the die. After wirebond and molding processes, the molded metal substrate strip assembly is processed through a metal etching process to remove the metal substrate portion that is exposed beyond the mold cap. A solder mask coating can be applied to protect the metal circuitry and to define the package pad opening to form Land-Grid-Array (LGA) packages. Solder balls can also be attached to form Ball-Grid-Array (BGA) packages.
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