Renesas Electronics Corporation

Renesas Technology Corp.

Hitachi Ulsi Systems Co., Ltd.

Other

Hitachi, Ltd.

Hitachi Device Engineering Co., Ltd.

Kazuhisa Higuchi

Yoshikazu Yokota

Kimihiko Sugiyama

Kunihiko Tani

Gorou Sakamaki

Takashi Yoneoka

Katsuhiko Yamamoto

Masashi Sahara

Yoshio Fukayama

Taku Kanaoka

Koji Fujishima

Yutaro Ebata

Keiichi Yoshizumi

Hideki Yasuoka

Masami Koketsu

Takayuki Nakaji

Shinya Suzuki

Shinobu Notomi

Taku Ishida

A semiconductor device includes plural electrode pads arranged in an active region of a semiconductor chip, and wiring layers provided below the plural electrode pads wherein occupation rates of wirings arranged within the regions of the electrode pads are, respectively, made uniform for every wiring layer. To this end, in a region where an occupation rate of wiring is smaller than those in other regions, a dummy wiring is provided. On the contrary, when the occupation rate of wiring is larger than in other regions, slits are formed in the wiring to control the wiring occupation rate. In the respective wirings layers, the shapes, sizes and intervals of wirings below the respective electrode pads are made similar or equal to one another.

Semiconductor device and a method of manufacturing the same

In conventional liquid crystal display controllers, the display is reduced in the stand-by state but the liquid crystal display duty is not changed, i.e., even the common electrodes of the rows that are not producing display are scanned, and the consumption of electric power is not decreased to a sufficient degree in the stand-by state. A liquid crystal display controller includes a drive duty selection register capable of being rewritten by a microprocessor, and a drive bias selection register. When the display is changed from the whole display on a liquid crystal display panel to a partial display on part of the rows only, the preset values of the drive duty selection register and of the drive bias selection register are changed, so that the display is selectively produced on a portion of the liquid crystal display panel at a low voltage with a low-duty drive.

Liquid crystal display controller and liquid crystal display device

A semiconductor device has an LCD driver formed over a silicon substrate. The LCD driver is arranged in a source output circuit region and includes two or more source output cells for generating data signals and two or more output pads for receiving the data signals and sending them to the outside. The two or more pads are arranged over the silicon substrate along a row direction, and the two or more source output cells are arranged in two rows and N columns along the row direction. A source output cell arranged at an Nth column of a first row is electrically coupled to a (2N&#x2212;1)th output pad. Also, a source output cell CSarranged at the Nth column of a second row is electrically coupled to a (2N)th output pad. The arrangement allows for a reduced chip size.

Semiconductor device

A semiconductor device which, in spite of the existence of a dummy active region, eliminates the need for a larger chip area and improves the surface flatness of the semiconductor substrate. In the process of manufacturing it, a thick gate insulating film for a high voltage MISFET is formed over an n-type buried layer as an active region and a resistance element IR of an internal circuit is formed over the gate insulating film. Since the thick gate insulating film lies between the n-type buried layer and the resistance element IR, the coupling capacitance produced between the substrate (n-type buried layer) and the resistance element IR is reduced.

Signal lines which provide electric connections from an internal circuit formed on a main surface of a semiconductor chip and including, for example, MIS transistor to protective elements constituted by, for example, diodes are drawn out from outlet ports formed on wiring lines disposed between the protective elements, and a signal line region occupied by the signal lines is provided over the protective elements and under electrode pads. A wiring region on the main surface of the semiconductor chip can be enlarged without increasing the chip area.

Semiconductor device with signal wirings and dummy wirings that pass through under electrode pads and in which the number of dummy wirings near the peripheral portion of the device being greater than at a more centrally located portion

In conventional liquid crystal display controllers such as for portable telephone sets, the display is reduced in the stand-by state but the liquid crystal display duty is not changed, i.e., even the common electrodes of the rows that are not producing display are scanned, and the consumption of electric power is not decreased to a sufficient degree in the stand-by state. A liquid crystal display controller () includes a drive duty selection register () capable of being rewritten by a microprocessor (), and a drive bias selection register (). When the display is changed from the whole display on a liquid crystal display panel () to a partial display on part of the rows only, the preset values of the drive duty selection register and of the drive bias selection register are changed, so that the display is selectively produced on a portion of the liquid crystal display panel at a low voltage with a low-duty drive.

Semiconductor device with pads overlapping wiring layers including dummy wiring

A liquid crystal display device includes a liquid crystal display panel and a semiconductor integrated circuit for driving and controlling the liquid crystal display panel. The number of input/output wires connected to I/O terminals (bonding pads) of the semiconductor integrated circuit is reduced so as to simplify wiring patterns of the I/O wires, whereby degrees of freedom in arranging the I/O wiring patterns are enhanced. The panel has a pair of insulating substrate, and the semiconductor integrated circuit is mounted on one of the paired substrates. The semiconductor integrated circuit has a mode terminal which is fixed to a power supply potential or to a reference potential during operation of the integrated circuit, and power supply dummy terminals connected to the power supply potential or reference potential inside the semiconductor integrated circuit. The wiring patterns formed on the paired insulating substrates connect the mode terminal to the power supply dummy terminals.

Liquid crystal display device, method for fabricating the same, and portable telephone using the same

A liquid crystal display device comprises a liquid crystal display panel and a semiconductor integrated circuit for driving and controlling the liquid crystal display panel. The number of input/output wires connected to I/O terminals (bonding pads) of the semiconductor integrated circuit is reduced so as to simplify wiring patterns of the I/O wires, whereby degrees of freedom in arranging the I/O wiring patterns are enhanced. The panel has a pair of insulating substrate, and the semiconductor integrated circuit is mounted on one of the paired substrates. The semiconductor integrated circuit has a mode terminal which is fixed to a power supply potential or to a reference potential during operation of the integrated circuit, and power supply dummy terminals connected to the power supply potential or reference potential inside the semiconductor integrated circuit. The wiring patterns formed on the paired insulating substrates connect the mode terminal to the power supply dummy terminals.

Growing community of inventors

Tachikawa, Japan

Kazuhisa Higuchi