Sensor-type semiconductor package and method for fabricating the same
First Claim
1. A fabricating method for fabricating a sensor-type semiconductor package, comprising the steps of:
- providing a wafer having a plurality of sensor chips and a carrier board, the wafer and each of the sensor chips having an active surface and a non-active surface opposed thereto, a sensing area and a plurality of solder pads being disposed on the active surface of each of the sensor chips, and the carrier board having a substrate, a plurality of conductive traces disposed on the substrate, and an insulation layer covering the substrate and the conductive traces, so as to mount the wafer on the insulation layer of the carrier board;
forming a plurality of grooves among the solder pads on the active surfaces of the sensor chips, and the depths of the grooves stopping at the positions of the conductive traces;
forming a metal layer in the grooves, and the metal player being electrically connected to the solder pads on the sensor chips and the conductive traces of the carrier board;
disposing a transparent medium on the wafer to cover the sensing areas;
removing the substrate of the carrier board, so as to expose the conductive traces and insulation layer; and
cutting the sensor chips along their borders to form a plurality of sensor-type semiconductor packages.
1 Assignment
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Accused Products
Abstract
The present invention provides a sensor-type semiconductor package and a method for fabricating the same. The method includes the steps of: providing a wafer having a plurality of sensor chips for mounting the wafer on a carrier board having an insulation layer, a plurality of conductive traces, and a substrate; forming a plurality of grooves among the solder pads on the active surfaces of the adjacent sensor chips, so as to expose the conductive traces and form a metal layer in the grooves, to electrically connect to the solder pads on the active surfaces of the adjacent sensor chips and the conductive traces; disposing a transparent medium on the wafer to cover the sensing areas of the sensor chips; removing the substrate, so as to expose the conductive traces and the insulation layer; and cutting the sensor chips along the borders to form a plurality of sensor-type semiconductor packages. This can avoid the formation of slanted grooves on the non-active surface on the wafer and shift in position of the grooves due to failure to align with the cutting lines among the sensor chips, as observed in prior art. Consequently, the problems such as stress concentration and cracking are likely to occur in the contact points of the traces formed in the slanted grooves and the traces in the active surfaces.
18 Citations
23 Claims
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1. A fabricating method for fabricating a sensor-type semiconductor package, comprising the steps of:
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providing a wafer having a plurality of sensor chips and a carrier board, the wafer and each of the sensor chips having an active surface and a non-active surface opposed thereto, a sensing area and a plurality of solder pads being disposed on the active surface of each of the sensor chips, and the carrier board having a substrate, a plurality of conductive traces disposed on the substrate, and an insulation layer covering the substrate and the conductive traces, so as to mount the wafer on the insulation layer of the carrier board; forming a plurality of grooves among the solder pads on the active surfaces of the sensor chips, and the depths of the grooves stopping at the positions of the conductive traces; forming a metal layer in the grooves, and the metal player being electrically connected to the solder pads on the sensor chips and the conductive traces of the carrier board; disposing a transparent medium on the wafer to cover the sensing areas; removing the substrate of the carrier board, so as to expose the conductive traces and insulation layer; and cutting the sensor chips along their borders to form a plurality of sensor-type semiconductor packages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A sensor-type semiconductor package, comprising:
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an insulation layer having a top surface and a bottom surface opposed thereto; a plurality of conductive traces disposed at the periphery of the bottom surface of the insulation layer; a sensor chip having an active surface and a non-active surface opposed thereto, the non-active surface being disposed on the top surface of the insulation layer, and a sensing area and a plurality of solder pads being formed on the active surface; a metal layer disposed on the sides of the sensor chip and the insulation layer, the metal layer being electrically connected to the solder pads of the sensor chip and the conductive traces at the bottom surface of the insulation layer; and a transparent medium formed on the active surface of the sensor chip to cover the sensing area. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification