Renesas Electronics Corporation

Renesas Technology Corp.

Koichi Kanemoto

Takashi Kikuchi

Chuichi Miyazaki

Toshihiro Shiotsuki

Chikako Imura

Michiaki Sugiyama

Kazuko Hanawa

Hiroshi Kawakukbo

Reliability of a semiconductor device is improved. A method of manufacturing a semiconductor device includes a step of arranging a plurality of semiconductor chips next to each other over a chip mounting surface of a die pad. Further, the method of manufacturing a semiconductor device includes a step of electrically coupling the semiconductor chip and the semiconductor chip via a wire. In this regard, a pad (chip-to-chip connection pad) of the semiconductor chip on a second bonding side in the step of coupling the wire is provided such that it is distantly located from a peripheral portion of a surface of the semiconductor chip.

Method of manufacturing semiconductor device and semiconductor device

A semiconductor device is reduced in size. The semiconductor device includes a die pad, a plurality of leads arranged around the die pad, a memory chip and a power source IC chip mounted over the die pad, a logic chip mounted over the memory chip, a plurality of down bonding wires for connecting the semiconductor chip to the die pad, a plurality of lead wires for connecting the semiconductor chip to leads, and a plurality of inter-chip wires. Further, the logic chip is arranged at the central part of the die pad in a plan view, and the power source IC chip is arranged in a corner part region of the die pad in the plan view. This reduces the size of the QFN.

Semiconductor device

In a QFP with a chip-stacked structure in which a lower surface of a die pad is exposed from a lower surface of a sealing member, a semiconductor chip having a BCB film, which is made of a polymeric material containing at least benzocyclobutene in its backbone as an organic monomer and formed on its surface, is mounted at a position (second stage) that is away from the die pad. As a result, even when moisture invades through the interface between the die pad and the sealing member, it is possible to prolong the time required for the moisture to reach the semiconductor chip, and subsequently to make moisture absorption defect less likely to occur.

The reliability of the semiconductor device which has the structure which stores a plurality of semiconductor chips with which plane sizes differ in the same sealing body in the state where they are accumulated via the insulating film which has adhesive property is improved. In the semiconductor device which has the structure which stores a plurality of semiconductor chips with which plane sizes differ in the same sealing body in the state where they are accumulated via DAF, thickness of DAF of the back surface of the uppermost semiconductor chip with which the control circuit was formed was made thicker than each of DAF of the back surface of the lower layer semiconductor chip with which the memory circuit was formed. Hereby, the defect that the bonding wire which connects the uppermost semiconductor chip and a wiring substrate contacts the main surface corner part of a lower layer semiconductor chip can be reduced.

Method of manufacturing semiconductor device

In the semiconductor device which has the structure which stores a plurality of semiconductor chips with which plane sizes differ in the same sealing body in the state where they are accumulated via DAF, thickness of DAF of the back surface of the uppermost semiconductor chip with which the control circuit was formed was made thicker than each of DAF of the back surface of the lower layer semiconductor chip with which the memory circuit was formed. Hereby, the defect that the bonding wire which connects the uppermost semiconductor chip and a wiring substrate contacts the main surface corner part of a lower layer semiconductor chip can be reduced.

This invention is to provide a nonvolatile memory device that enhances a size reduction and mass productivity while ensuring reliability and signal transmission performance. A nonvolatile memory chip having a first side formed with no pads and a second side formed with pads is mounted on a mounting substrate. A control chip for controlling the nonvolatile memory chip is mounted on the nonvolatile memory chip. The control chip has a first pad row corresponding to the pads of the nonvolatile memory chip. The first pad row is mounted adjacent to the first side of the nonvolatile memory chip. The first pad row of the control chip and a first electrode row formed on the mounting substrate are connected via a first wire group. The pads of the nonvolatile memory chip and a second electrode row formed on the mounting substrate are connected via a second wire group. The first electrode row and the second electrode row are connected through wirings formed in the mounting substrate.

A semiconductor device which stores a plurality of semiconductor chips, having planar sizes which differ, in the same sealing body in a state in which they are accumulated via an insulating film which has an adhesive property. In the semiconductor device, the thickness of DAF of the back surface of the uppermost semiconductor chip with which the control circuit is formed is thicker than each of DAF of the back surface of the lower layer semiconductor chip with which the memory circuit is formed.

By preparing a package substrate which has a plurality of lands of NSMD structure, and the output wiring and dummy wiring which were connected to each of the lands, and have been arranged mutually in location of 180&#xb0; symmetry, and printing solder by a printing method to the lands after the package assembly, the variation in the height of the solder coat between lands can be reduced, and improvement in the mountability of LGA (semiconductor device) is achieved.

Growing community of inventors

Tokyo, Japan

Koichi Kanemoto