Process for producing a semiconductor package
First Claim
1. A process for producing a semiconductor package, said process comprising the following steps of:
- preparing a plurality of circuit boards, each having an opening for forming a cavity and a surface providing with a circuit pattern having bonding sections at a peripheral area of said opening;
coating said bonding sections of the respective circuit boards with protective films;
forming a laminated body by laminating said plurality of circuit boards by means of adhesive sheets arranged between said respective circuit boards so that said cavity is defined by said openings and said bonding sections of the respective circuit boards are exposed in said cavity, and laminating first and second substrates on upper and lower surfaces of said plurality of circuit boards, respectively, by means of adhesive sheets to close said cavity;
providing said laminated body with through-holes for connecting said circuit patterns to external terminals and plating said through-holes with conductive metal;
forming an opening to at least one of said first and second substrates so that said cavity is opened; and
removing said protective films from said bonding sections of the respective circuit boards of the laminated body.
1 Assignment
0 Petitions
Accused Products
Abstract
A semiconductor package is produced by the following steps. A plurality of circuit boards are prepared, each board having an opening for forming a cavity and a surface providing with a circuit pattern having bonding sections at a peripheral area of the opening. The bonding sections of the respective circuit boards are covered with protective films. A laminated body is formed by laminating the plurality of circuit boards by means of adhesive sheets arranged between the respective circuit boards. Upper and lower substrates are also laminated on upper and lower surfaces of the plurality of circuit boards, respectively, by means of adhesive sheets to close the cavity. The protective films are subsequently removed from the bonding sections of the respective circuit boards of the laminated body.
34 Citations
9 Claims
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1. A process for producing a semiconductor package, said process comprising the following steps of:
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preparing a plurality of circuit boards, each having an opening for forming a cavity and a surface providing with a circuit pattern having bonding sections at a peripheral area of said opening; coating said bonding sections of the respective circuit boards with protective films; forming a laminated body by laminating said plurality of circuit boards by means of adhesive sheets arranged between said respective circuit boards so that said cavity is defined by said openings and said bonding sections of the respective circuit boards are exposed in said cavity, and laminating first and second substrates on upper and lower surfaces of said plurality of circuit boards, respectively, by means of adhesive sheets to close said cavity; providing said laminated body with through-holes for connecting said circuit patterns to external terminals and plating said through-holes with conductive metal; forming an opening to at least one of said first and second substrates so that said cavity is opened; and removing said protective films from said bonding sections of the respective circuit boards of the laminated body. - View Dependent Claims (2, 3, 4)
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5. A process for producing a semiconductor package, said process comprising the following steps of:
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preparing a plurality of circuit boards, each having an opening for forming a cavity and a surface providing with a circuit pattern having bonding sections at a peripheral area of said opening; coating said surfaces of the respective circuit boards with photoresist; optically exposing part of said photoresist on the respective circuit board in such a manner that protective films of said photoresist, which can be removed in a subsequent step, are formed on said bonding sections; forming a laminated body by laminating said plurality of circuit boards by means of adhesive sheets arranged between said respective circuit boards so that said cavity is defined by said openings and said bonding sections of the respective circuit boards are exposed in said cavity, and laminating first and second substrates on upper and lower surfaces of said plurality of circuit boards, respectively, by means of adhesive sheets to close said cavity; providing said laminated body with through-holes for connecting said circuit patterns to external terminals and plating said through-holes with conductive metal; forming an opening to at least one of said first and second substrates so that said cavity is opened; and removing said protective films from said bonding sections of the respective circuit boards of the laminated body. - View Dependent Claims (6, 7, 8, 9)
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Specification