Wafer scale caps located by molding
First Claim
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1. A method of applying and accurately locating a plurality of caps to a plurality of microfabricated devices at the wafer stage, the method including:
- a) forming, in a two part mold, a plurality of first hollow molded caps, from a layer of thermoplastic material which is placed in a mold, the mold having first and second mold halves which are brought together to form the caps, each cap having a central portion and a perimeter wall;
b) opening the mold so that the caps are carried as an array by the first half;
thenc) applying, using the first half, the array to one side of a wafer.
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Abstract
A method is taught for applying and accurately locating a plurality of caps to a plurality of microfabricated devices at the wafer stage. The method involves using a two part mold to make a plurality of first hollow molded caps. The caps are made from a layer of thermoplastic material which is placed in the mold. Each cap having a central portion and a perimeter wall. The mold is opened so that the caps are carried by the first half. The caps are applied to a wafer using the first half. After the caps are applied, the wafer may be separated into individual chips.
13 Citations
19 Claims
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1. A method of applying and accurately locating a plurality of caps to a plurality of microfabricated devices at the wafer stage, the method including:
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a) forming, in a two part mold, a plurality of first hollow molded caps, from a layer of thermoplastic material which is placed in a mold, the mold having first and second mold halves which are brought together to form the caps, each cap having a central portion and a perimeter wall; b) opening the mold so that the caps are carried as an array by the first half;
thenc) applying, using the first half, the array to one side of a wafer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification