Ricoh Company, Ltd.

Kaihei Isshiki

Hirofumi Watanabe

Junichi Azumi

Katsunari Hanaoka

Kunihiro Yamanaka

Mitsugu Irinoda

Yukito Satoh

Shuya Abe

Kouji Ohnishi

Yukihiro Ageishi

Yasuyuki Shindou

Tetsurou Tanigawa

An ink-jet head includes a nozzle which discharges an ink drop to a recording medium. A discharging chamber communicates with the nozzle and contains ink therein. An oscillation plate is provided on a first substrate of silicon, the oscillation plate defining a bottom surface of the discharging chamber, the oscillation plate pressurizing the ink in the discharging chamber when the oscillation plate is actuated. An electrode is provided on a second substrate of silicon, the electrode facing the oscillation plate via a gap between the oscillation plate and the electrode. In the ink-jet head, at least one of a first bonding area of the first substrate and a second bonding area of the second substrate is provided with a silicon oxide film, and the silicon oxide film contains boron on a surface thereof where the first substrate and the second substrate are bonded together.

Ink-jet head, method of producing the same, and ink-jet printing system including the same

An electrostatic actuator includes a diaphragm caused to vibrate by electrostatic force, an electrode substrate opposing the diaphragm, an electrode formed on the electrode substrate so as to oppose said diaphragm with a gap being formed between the electrode and the diaphragm, an anti-corrosive thin film formed on said diaphragm, and diaphragm deflection prevention means preventing the diaphragm from deflecting.

Electrostatic actuator, method of producing electrostatic actuator, micropump, recording head, ink jet recording apparatus, ink cartridge, and method of producing recording head

The present invention provides a liquid droplet discharging head which can reduce crosstalk and maintain reliability with high-density nozzles. In the liquid droplet discharging head of the present invention, the bonding portion between a substrate on which a diaphragm is disposed and a substrate on which electrodes are disposed has a width between 5 &mgr;m and 25 &mgr;m.

Liquid droplet discharging head and ink jet recording device

An ink-jet head includes nozzle holes for firing ink drops, ink flow paths with which the nozzle holes communicate, vibration plates which are walls of the ink flow paths, and electrodes facing the vibration plates, and firing the ink drops from the nozzle holes as a result of the vibration plates being deformed by electrostatic forces between the vibration plates and electrodes. The electrodes are provided on an electrode substrate having conductivity with an insulating layer provided therebetween, and the electrode substrate and the vibration plates are electrically connected together.

Ink-jet head

In a manufacturing method of a semiconductor device, a gate insulating film is grown in an active region. Thereafter, an N-type polysilicon film is formed on the gate insulating film and is patterned so that a gate electrode and a polysilicon electrode are formed. Next, arsenic ions are implanted onto entire faces of the gate and polysilicon electrodes so that a source-drain region is formed on a substrate. An interlayer insulating film is then formed on an entire face of the source-drain region, etc. Thereafter, a contact hole is formed on a drain region in a position in which the drain region partially overlaps the polysilicon electrode. A surface portion of the polysilicon electrode is exposed into the contact hole. Thereafter, phosphoric ions are implanted through the contact hole with the interlayer insulating film as a mask. The implanted ions are thermally processed to activate these implanted ions. Thereafter, metal wiring is formed. Thus, resistance of a common contact having s three-dimensional structure is reduced.

Semiconductor device with contact hole

A method and an apparatus by use of three-dimensional photo-lithographic exposure employed for transferring an image to a recording medium among a series of processing works of practicing groove-processing, etc., corresponding to the image by utilization of photo-etching technology or the like, the apparatus for performing three-dimensional exposure comprising an optical unit, a work gripping assembly, a work moving mechanism, a control unit, and a main body frame, and the optical unit comprising a light source portion, a lens portion, and a reflection mirror, wherein the ultraviolet rays focused by the reflection mirror through a slit of a photo-mask onto a photo-sensitive coating film formed on an outer surface of a work loosely inserted into the through-hole of the reflection mirror together with a photo-mask surrounding an outer circumference of the work.

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Tokyo, Japan

Kaihei Isshiki