MANUFACTURING METHOD OF SEMICONDUCTOR DEVICE AND SEMICONDUCTOR DEVICE
First Claim
1. A method of manufacturing a semiconductor device, comprising the steps of:
- (a) providing a lead frame having a chip mounting portion and a plurality of leads;
(b) mounting a semiconductor chip over the chip mounting portion, the semiconductor chip having a plurality of pad electrodes;
(c) after the step (b), electrically connecting the plurality of pad electrodes of the semiconductor chip with the plurality of leads via a plurality of wires, respectively;
(d) after the step (c), forming a resin sealing portion which seals the semiconductor chip, the plurality of wires, the chip mounting portion and the plurality of leads; and
(e) after the step (d), cutting the resin sealing portion and the plurality of leads with a rotary blade, wherein the resin sealing portion formed in the step(d) has a first upper surface and a first lower surface which are located opposite to each other,wherein, in the step (d), at least a part of each of the plurality of leads is exposed from the first lower surface of the resin sealing portion,wherein, in the step (e), a cut surface of each of the plurality of leads resulting from the step (e) is exposed from a cut surface of the resin sealing portion resulting from the step (e),wherein the plurality of leads include a first lead and a second lead located next to the first lead,wherein a first end surface as the cut surface of the first lead resulting from the step (e) has a first upper side closer to the first upper surface and a first lower side far away from the first upper surface,wherein a second end surface as the cut surface of the second lead resulting from the step (e) has a second upper side closer to the first upper surface and a second lower side far away from the first upper surface, andwherein a distance between the first lower side and the first upper surface in a thickness direction of the resin sealing portion is smaller than a distance between the second upper side and the first upper surface in the thickness direction of the resin sealing portion.
1 Assignment
0 Petitions
Accused Products
Abstract
An improvement is achieved in the reliability of a semiconductor device. After a resin sealing portion is formed to seal a die pad, a semiconductor chip mounted over the die pad, a plurality of leads, and a plurality of wires electrically connecting a plurality of pad electrodes of the semiconductor chip with the leads, the resin sealing portion and the leads are cut with a rotary blade to manufacture the semiconductor device. In the semiconductor device, at least a portion of each of first and second leads is exposed from a lower surface of the sealing portion. End surfaces of the first and second leads as the respective cut surfaces thereof are exposed from each of side surfaces of the sealing portion as the cut surfaces of the resin sealing portion. The distance between a lower side of the end surface of the first lead and an upper surface of the sealing portion is smaller than the distance between an upper side of the end surface of the second lead adjacent thereto and the upper surface of the sealing portion.
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Citations
20 Claims
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1. A method of manufacturing a semiconductor device, comprising the steps of:
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(a) providing a lead frame having a chip mounting portion and a plurality of leads; (b) mounting a semiconductor chip over the chip mounting portion, the semiconductor chip having a plurality of pad electrodes; (c) after the step (b), electrically connecting the plurality of pad electrodes of the semiconductor chip with the plurality of leads via a plurality of wires, respectively; (d) after the step (c), forming a resin sealing portion which seals the semiconductor chip, the plurality of wires, the chip mounting portion and the plurality of leads; and (e) after the step (d), cutting the resin sealing portion and the plurality of leads with a rotary blade, wherein the resin sealing portion formed in the step (d) has a first upper surface and a first lower surface which are located opposite to each other, wherein, in the step (d), at least a part of each of the plurality of leads is exposed from the first lower surface of the resin sealing portion, wherein, in the step (e), a cut surface of each of the plurality of leads resulting from the step (e) is exposed from a cut surface of the resin sealing portion resulting from the step (e), wherein the plurality of leads include a first lead and a second lead located next to the first lead, wherein a first end surface as the cut surface of the first lead resulting from the step (e) has a first upper side closer to the first upper surface and a first lower side far away from the first upper surface, wherein a second end surface as the cut surface of the second lead resulting from the step (e) has a second upper side closer to the first upper surface and a second lower side far away from the first upper surface, and wherein a distance between the first lower side and the first upper surface in a thickness direction of the resin sealing portion is smaller than a distance between the second upper side and the first upper surface in the thickness direction of the resin sealing portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of manufacturing a semiconductor device, comprising the steps of:
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(a) providing a lead frame having a first device formation region and a second device formation region located next to the first device formation region via a dam bar, wherein each of the first and second device formation regions has a chip mounting portion, a plurality of suspension leads supporting the chip mounting portion, and a plurality of leads; (b) mounting a first semiconductor chip over the chip mounting portion in the first device formation region and mounting a second semiconductor chip over the chip mounting portion in the second device formation region, wherein each of the first and second semiconductor chips having a plurality of pad electrodes; (c) after the step (b), electrically connecting the plurality of pad electrodes of the first semiconductor chip with the plurality of leads in the first device formation region via a plurality of first wires, respectively, and electrically connecting the plurality of pad electrodes of the second semiconductor chip with the plurality of leads in the second device formation region via a plurality of second wires, respectively; and (d) after the step (c), forming a resin sealing portion so as to cover the first and second device formation regions of the lead frame, wherein the resin sealing portion seals the first semiconductor chip, the plurality of first wires, the chip mounting portion, and the plurality of leads in the first device formation region, and the second semiconductor chip, the plurality of second wires, the chip mounting portion, and the plurality of leads in the second device formation region, wherein the resin sealing portion has a first upper surface and a first lower surface which are located opposite to each other, and wherein at least a portion of each of the plurality of leads in the first and second device formation regions is exposed from the first lower surface of the resin sealing portion; (e) after the step (d), cutting the resin sealing portion, the plurality of leads, the plurality of suspension leads, and the dam bar between the first and second device formation regions with a rotary blade, wherein a cut surface of each of the plurality of leads resulting from the step (e) is exposed from a cut surface of the resin sealing portion resulting from the step (e), wherein the plurality of leads include a first lead and a second lead located next to the first lead, wherein a first end surface as the cut surface of the first lead resulting from the step (e) has a first upper side closer to the first upper surface and a first lower side far away from the first upper surface, wherein a second end surface as the cut surface of the second lead resulting from the step (e) has a second upper side closer to the first upper surface and a second lower side far away from the first upper surface, and wherein a distance between the first lower side and the first upper surface in a thickness direction of the resin sealing portion is smaller than a distance between the second upper side and the first upper surface in the thickness direction of the resin sealing portion. - View Dependent Claims (12)
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13. A semiconductor device, comprising:
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a chip mounting portion; a semiconductor chip mounted over the chip mounting portion and having a plurality of pad electrodes; a plurality of leads; a plurality of wires electrically connecting the plurality of pad electrodes of the semiconductor chip with the plurality of leads; and a resin sealing portion which seals the chip mounting portion, the semiconductor chip, the wires, and the leads, wherein the resin sealing portion has a first upper surface and a first lower surface which are located opposite to each other, and a plurality of side surfaces located between the first upper surface and the first lower surface, wherein at least a portion of each of the plurality of leads is exposed from the first lower surface of the resin sealing portion, wherein the plurality of leads include a first lead and a second lead located next to the first lead, wherein a first end surface of the first lead and a second end surface of the second lead are exposed from a first side surface which is among the side surfaces of the resin sealing portion, wherein the first end surface of the first lead has a first upper side closer to the first upper surface and a first lower side far away from the first upper surface, wherein the second end surface of the second lead has a second upper side closer to the first upper surface and a second lower side far away from the first upper surface, wherein, on the first end surface of the first lead and the second end surface of the second lead, metal burrs are formed to extend in respective directions parallel with each of the first lower surface and the first side surface, and wherein a distance between the first lower side and the first upper surface in a thickness direction of the resin sealing portion is smaller than a distance between the second upper side and the first upper surface in the thickness direction of the resin sealing portion. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification