SEMICONDUCTOR PACKAGE AND METHOD OF MANUFACTURING SAME
First Claim
1. A method for manufacturing a semiconductor package comprising:
- providing a lead frame, said lead frame being formed from an electrically conductive sheet having a plurality of leads extending from a lead frame boundary towards a central region of said lead frame;
encapsulating said lead frame with a first encapsulant such that a top surface of each of said leads is exposed from said first encapsulant;
mounting a semiconductor die on said first encapsulant located in said central region of said lead frame;
forming electrically conductive interconnects between die pads on said semiconductor die and said top surface of respective ones of said plurality of leads; and
encapsulating said semiconductor die, said conductive interconnects, and said top surface of said leads with a second encapsulant.
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Accused Products
Abstract
A semiconductor die is electrically connected to the leads of a flagless lead frame and is fully encapsulated by encapsulant to form a semiconductor package. A method of manufacturing the semiconductor package entails encapsulating a flagless lead frame with a first encapsulant such that a top surface of the leads of the flagless lead frame are exposed from the first encapsulant. A semiconductor die is mounted directly to the first encapsulant located in a central region of the lead frame. Electrically conductive interconnects are formed between die pads on the semiconductor die and the top surface of respective leads of the lead frame. The semiconductor die, conductive interconnects, and top surface of the leads is encapsulated with a second encapsulant so that the semiconductor die is sandwiched between the first and second encapsulants, thus isolating the semiconductor die from package stresses.
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Citations
20 Claims
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1. A method for manufacturing a semiconductor package comprising:
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providing a lead frame, said lead frame being formed from an electrically conductive sheet having a plurality of leads extending from a lead frame boundary towards a central region of said lead frame; encapsulating said lead frame with a first encapsulant such that a top surface of each of said leads is exposed from said first encapsulant; mounting a semiconductor die on said first encapsulant located in said central region of said lead frame; forming electrically conductive interconnects between die pads on said semiconductor die and said top surface of respective ones of said plurality of leads; and encapsulating said semiconductor die, said conductive interconnects, and said top surface of said leads with a second encapsulant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for manufacturing a plurality of semiconductor packages comprising:
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providing an electrically conductive sheet of flagless lead frames, each of said flagless lead frames having a plurality of leads extending from a lead frame boundary towards a central region of said lead frame; encapsulating said electrically conductive sheet of flagless lead frames with a first encapsulant such that a top surface of each of said leads is exposed from said first encapsulant; mounting semiconductor dies on said first encapsulant located in each said central region of said each of said flagless lead frames by directly coupling said semiconductor dies to said first encapsulant; forming electrically conductive interconnects between die pads on said semiconductor dies and said top surface of respective ones of said plurality of leads; encapsulating said semiconductor dies, said conductive interconnects, and said top surface of said leads with a second encapsulant to form a composite structure; and separating said composite structure into said plurality of semiconductor packages following both of said encapsulating operations, each of said semiconductor dies being sandwiched between a portion of said first encapsulant and a portion of said second encapsulant. - View Dependent Claims (11, 12, 13, 14)
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15. A semiconductor package comprising
a lead frame embedded in a first encapsulant, said lead frame being formed from an electrically conductive sheet having a plurality of leads extending from a lead frame boundary towards a central region of said lead frame, wherein a top surface of each of said leads is exposed from said first encapsulant; -
a semiconductor die in direct contact with said first encapsulant located in said central region of said lead frame; conductive interconnects electrically connected between die pads on said semiconductor die and said top surface of respective ones of said plurality of leads; and a second encapsulant covering said semiconductor die, said conductive interconnects, and said top surface of said leads. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification