Mold tool for an optoelectronic element
First Claim
1. A mold tool for an optoelectronic device comprising:
- a first mold piece having a surface that defines a first cavity and an aperture within said first cavity;
a second mold piece having a surface which defines a second cavity, said first cavity cooperating with said second cavity to form a molding compound into a predetermined shape; and
an ejector pin having a contoured tip, said pin movably located within said aperture between a first position retracted within said aperture so that said tip constitutes an integral portion of said first cavity and a second position extended from said aperture so that said ejector pin facilitates removal of said compound from said first cavity, wherein said predetermined shape is at least partially defined by said contoured tip.
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Accused Products
Abstract
An optoelectronic component has a lens that is formed in the surface of an encapsulant surrounding a semiconductor diode element. With respect to emitters, the lens reduces internal reflection and reduces dispersion to increase overall efficiency. With respect to detectors, the lens focuses photons on the active area of the detector, increasing detector sensitivity, which allows a detector having a reduced size and reduced cost for a given application. The lens portion of the encapsulant is generally non-protruding from the surrounding portions of the encapsulant reducing contact surface pressure caused by the optoelectronic component. This non-protruding lens is particularly useful in pulse oximetry sensor applications. The lens is advantageously formed with a contoured-tip ejector pin incorporated into the encapsulant transfer mold, and the lens shape facilitates mold release.
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Citations
7 Claims
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1. A mold tool for an optoelectronic device comprising:
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a first mold piece having a surface that defines a first cavity and an aperture within said first cavity;
a second mold piece having a surface which defines a second cavity, said first cavity cooperating with said second cavity to form a molding compound into a predetermined shape; and
an ejector pin having a contoured tip, said pin movably located within said aperture between a first position retracted within said aperture so that said tip constitutes an integral portion of said first cavity and a second position extended from said aperture so that said ejector pin facilitates removal of said compound from said first cavity, wherein said predetermined shape is at least partially defined by said contoured tip. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification