Patent ID: 8033446
Filing Date: 2011-10-11
Classification: B23K,H01L,H04N,Y10T

Abstract:
1. A manufacturing method of a solid-state image pickup device comprising the steps of: (a) providing a wiring substrate having an upper surface, a lower surface opposite to the upper surface, an opening formed in a planned chip-mounting region on the lower surface, and a plurality of bonding leads formed around the opening on the lower surface; (b) providing a sensor chip having a main surface, a sensor surface formed on the main surface, a plurality of bump electrodes formed in an outer peripheral portion located around the sensor surface on the main surface, and a back surface opposite to the main surface, the outer peripheral portion having a first region and a second region; (c) supplying a first sealing material made of a thermosetting resin to a first part of the planned chip-mounting region on the lower surface of the wiring substrate; (d) after the step (c), mounting the sensor chip on the planned chip-mounting region of the wiring substrate such that the main surface of the sensor chip faces the lower surface of the wiring substrate, the bump electrodes of the sensor chip face the bonding leads of the wiring substrate, respectively, and the sensor surface of the sensor chip is exposed from the opening, and curing the first sealing material; (e) after the step (d), supplying a second sealing material to a second part of the planned chip-mounting region on the lower surface of the wiring substrate; and (f) after the step (e), curing the second sealing material, wherein bump electrodes are arranged in the first region and no bump electrode is arranged in the second region, and wherein in the step (c), the first sealing material is supplied to a region planarly overlapped with the first region when the sensor chip is mounted in the step (d), and the first sealing material is not supplied to a region planarly overlapped with the second region when the sensor chip is mounted in the step (d), wherein in the step (e), the second sealing material is supplied to a region planarly overlapped with the second region, wherein the wiring substrate is a flexible wiring substrate, wherein, in the step (d), the bump electrodes of the sensor chip are connected to respective bonding leads of the wiring substrate, while heating the sensor chip, wherein, in the step (d), the bump electrodes of the sensor chip are thermocompression-bonded onto respective bonding leads of the wiring substrate, and wherein each of the bump electrodes thermocompression-bonded onto the bonding leads in step (d) is surrounded by the first sealing material cured by the heating.