摘要:
A method for producing a cellulose acylate film is provided and includes the steps of: a stretching step of stretching a film; and a shrinking step of shrinking the film
摘要:
An optical resin film is provided and fulfills the following formulae (A) to (D) concerning retardations and is formed by using a polymer or a copolymer of a cycloolefin compound: 0.1
摘要:
A cellulose acylate film comprising cellulose acylate which has a degree of crystallinity represented by the following expression (I) of 0.9 or more, and satisfies the following expressions (II) and (III): Degree of crystallinity=(X-ray diffraction intensity at 2θ of 13°)/(X-ray diffraction intensity at 2θ of 12°); Expression (I) 2.6≦A+B≦3.0; and Expression (II) 0.5≦B≦1.2 Expression (III) wherein A represents a substitution degree by an acetyl group of a hydroxyl group in a glucose unit of the cellulose acylate, and B represents a substitution degree by a substituent having from 3 to 4 carbon atoms of a hydroxyl group of a glucose unit of the cellulose acylate.
摘要:
A cellulose acylate film comprising a retardation developing agent consisting of a rodshaped compound, wherein Re is 50 to 100 nm, Rth is 130 to 250 nm, and the thickness is 40 to 90 μm. A liquid crystal display device comprising the film shows reduced the corner irregularity.
摘要:
The variable-shape mirror is provided with a support base and a minor portion that is disposed to face the support base and that has on a side thereof facing away from the support base a minor surface which is irradiated with a light beam. There are also provided piezoelectric elements that are sandwiched between the support base and the mirror portion and that vary the shape of the mirror surface. The piezoelectric elements are bonded, through a thin layer of metal that is separately provided for bonding, to at least one of the support base and the mirror portion. A driving voltage to the piezoelectric elements is supplied through the thin layer of metal.
摘要:
A novel color filter to be employed in a liquid crystal display device is disclosed. The color filter comprises at least two colored sub-pixels in each pixel; at least one of the colored sub-pixels in each pixel comprises a retardation-controlling agent; and retardation is substantially different from each other between the two colored sub-pixels.
摘要:
An optical film having a value of 1.6 or more, wherein the value is obtained by dividing a larger value by a smaller value of the maximum X-ray diffraction intensity within a range 2θ=10 to 40° in a longitudinal direction of the film and the maximum X-ray diffraction intensity within a range 2θ=10 to 40° in a direction approximately vertical to the longitudinal direction of the film, and an optical film having a value of 1.3 or more, wherein the value is obtained by dividing a larger value by a smaller value of a tensile elastic modulus in a longitudinal direction of the film and a tensile elastic modulus in a direction approximately vertical to the longitudinal direction of the film.
摘要:
A variable-shape mirror is provided with: a support base; a mirror portion that is disposed to face the support base and that has, on a side thereof facing away from the support base, a mirror surface which is irradiated with a light beam; fixed portions that fix the mirror portion to the support base; and piezoelectric elements that are sandwiched between the support base and the mirror portion and that vary a shape of the mirror surface. Here, the piezoelectric elements are arranged closer to a center of the mirror portion than the fixed portions are.
摘要:
A semiconductor pressure sensor having a diaphragm formed over the surface of a semiconductor substrate by thin film forming technique is provided. The sensor comprises: a sacrificial film including a vanishable portion covering a pressure receiving region on the major surface of the semiconductor substrate and a diaphragm support portion covering the periphery of the pressure receiving region, the vanishable portion having an isotropic etching property along the pressure receiving region and the diaphragm support portion having an etching-resistant property; an insulation diaphragm film having an etching-resistant property formed on the major surface of the semiconductor substrate over the sacrificial film; at least one etching solution inlet port formed through the insulation diaphragm film to reach the vanishable portion of the sacrificial film; a reference pressure chamber formed by etching and removing at least the vanishable portion of the sacrificial film with an etching solution poured through the inlet port; and at least one strain gauge formed on the insulation diaphragm film in place at the pressure receiving region. The peripheral region of the movable diaphragm can be formed into a flat configuration without any stepped structure. Thus, the semiconductor pressure snesor has an improved characteristics.
摘要:
A static induction type semiconductor device is used as a power transistor. It is of the surface gate type and is used for providing a high current density. The static induction type semiconductor device provides a plurality of small source regions surrounded by a gate region. According to this structure, the channel region beneath the source region becomes small, thereby increasing the stored carrier density and enabling a large main current to flow when using a small gate current, thereby achieving a high current amplification ratio. Further, when it flows the main current is distributed to the source regions, thus preventing increase in on-voltage.