Nitto-denko Corporation

Mitsubishi Chemical Corporation

Kazuki Uwada

Nao Murakami

Takashi Shimizu

Tadashi Kojima

Hironori Yaginuma

Kozo Nakamura

Kentarou Takeda

Hiroyuki Takemoto

Yuji Hotta

Daisuke Hattori

Hiromoto Haruta

Naoki Sadayori

Akiko Matsumura

Toshiyuki Iida

Shingo Namiki

Tomohiko Tanaka

Noriaki Harada

Masatsugu Higashi

Takashi Kumano

A film is provided with void spaces having a porous structure with less cracks and a high proportion of void space as well as having strength. The film with void spaces includes one kind or two or more kinds of structural units that form a structure with minute void spaces, wherein the structural units are chemically bonded through catalysis. For example, the abrasion resistance measured with BEMCOT&#xae; is in the range from 60% to 100%, and the folding endurance measured by the MIT test is 100 times or more. The film with void spaces can be produced by forming the precursor of the silicone porous body using sol containing pulverized products of a gelled silicon compound and then chemically bonding the pulverized products contained in the precursor of the silicone porous body. The chemical bond among the pulverized products is preferably a chemical crosslinking bond among the pulverized products.

Film with void spaces bonded through catalysis and method of producing the same

The present invention provides, for example, a silicone porous body having a porous structure with less cracks and a high proportion of void space as well as having a strength. The silicone porous body of the present invention includes silicon compound microporous particles, wherein the silicon compound microporous particles are chemically bonded by catalysis. For example, the abrasion resistance measured with BEMCOT&#xae; is in the range from 60% to 100%, and the folding endurance measured by the MIT test is 100 times or more. The silicone porous body can be produced, for example, by forming the precursor of the silicone porous body using sol containing pulverized products of a gelled silicon compound and then chemically bonding the pulverized products contained in the precursor of the silicone porous body. The chemical bond among the pulverized products is preferably a chemical crosslinking bond among the pulverized products, for example.

Silicone porous body and method of producing the same

There is provided a circularly polarizing plate for an organic EL display apparatus that is excellent in productivity, is prevented from warping, and can achieve an excellent tint. An elongated circularly polarizing plate for an organic EL display apparatus according to an embodiment of the present invention includes in the following order: an elongated polarizer having an absorption axis in a longitudinal direction thereof; an elongated first retardation layer functioning as a &#x3bb;/2 plate; and an elongated second retardation layer functioning as a &#x3bb;/4 plate. An angle formed between the absorption axis of the elongated polarizer and a slow axis of the elongated first retardation layer is front 15&#xb0; to 30&#xb0;; and the absorption axis of the elongated polarizer and a slow axis of the elongated second retardation layer are substantially perpendicular to each other.

Circular polarizer for organic EL display device having laminated half wavelength plate and quarter wavelength plate, and organic EL display device

There is provided a display apparatus that can suppress the occurrence of a crack in a circularly polarizing plate in its manufacturing process without reducing designability and mass productivity. A display apparatus according to an embodiment of the present invention includes: a display element; and a circularly polarizing plate placed on a viewer side of the display element. The circularly polarizing plate includes a polarizer and a retardation film. In-plane retardations of the retardation film satisfy a relationship represented by the below-indicated expression (1); and an angle &#x3b8;1 formed between a slow axis of the retardation film and a direction in which a wiring crimping portion provided along at least one side of a peripheral edge portion of the display element extends satisfies a relationship represented by the below-indicated expression (2):(450)&#x3c;(550)&#x2003;&#x2003;(1)&#x3b8;1&#x2266;70&#xb0;&#x2003;&#x2003;(2)where Re(450) and Re(550) represent in-plane retardations measured at 23&#xb0; C., and at wavelengths of 450 nm and 550 nm, respectively.

Display device and method for manufacturing same

There is provided a polarizing plate that achieves an excellent reflection hue. A polarizing plate according to an embodiment of the present invention is used in an organic EL panel, and includes a polarizer and a retardation film. In-plane retardations of the retardation film satisfy a relationship of Re(450)&#x3c;Re(550); and an angle &#x3b8; formed between an absorption axis of the polarizer and a slow axis of the retardation film satisfies a relationship of 38&#xb0;&#x2266;&#x3b8;&#x2266;44&#xb0; or of 46&#xb0;&#x2266;&#x3b8;&#x2266;52&#xb0;.

Polarizing plate and organic EL panel

The present invention provides a retardation film web having sufficient reversed wavelength dispersion characteristics and favorable for film lamination according to a roll-to-roll system. A retardation film web of the present invention includes a polycarbonate resin or a polyester carbonate resin, an orientation angle &#x3b8; which is an angle between a slow axis and a width direction satisfies the following formula (I), and a ratio of an in-plane retardation R450 measured at a wavelength of 450 nm to an in-plane retardation R550 measured at a wavelength of 550 nm satisfies the following formula (II):38&#xb0;&#x2266;&#x3b8;&#x2266;52&#xb0;&#x2003;&#x2003;(I)R450/R550&#x3c;1&#x2003;&#x2003;(II).

Retardation film web, circularly polarizing plate and organic EL panel

There is provided a circularly polarizing plate that can prevent light leakage in an organic EL panel and can suppress the warping of the panel to reduce reflection unevenness in a panel surface. A circularly polarizing plate according to an embodiment of the present invention is used in an organic EL panel, and includes a polarizer and a retardation film directly bonded to the polarizer. In-plane retardations of the retardation film satisfy a relationship of Re(450)&#x3c;Re(550); and a 90&#xb0; adhesive strength between the polarizer and the retardation film is 1.0 N/20 mm or more.

Circular polarizing plate and organic electroluminescence panel

Provided is a polarizing plate that has an excellent viewing angle characteristic and suppresses changes in display characteristics. A polarizing plate of the present invention is used in an organic EL panel, and includes a polarizer (), a first retardation layer (), and a second retardation layer (). The first retardation layer () shows a refractive index characteristic of nx&#x3e;ny&#x2267;nz, satisfies a relationship of Re(450)&#x3c;Re(550), and has a water absorption rate of 3% or less. The second retardation layer () shows a refractive index characteristic of nz&#x3e;nx&#x2267;ny. A laminate of the first retardation layer () and the second retardation layer () has an Re(550) of from 120 nm to 160 nm and an Rth(550) of from 40 nm to 100 nm.

The present invention provides a polarizing plate that includes: a transparent protective film; a polarizer; and an optical compensation layer. The transparent protective film, the polarizer, and the optical compensation layer are laminated in this order. A moisture percentage of the polarizing plate is 2.8% by mass or less. The optical compensation layer includes a retardation film. The retardation film includes at least one resin selected from the group consisting of norbornene resins, cellulose resins, polyvinyl acetal resins, polyimide resins, polyester resins, and polycarbonate resins. The optical compensation layer shows an optical property represented by the following formula (I):nx&#x3e;ny&#x3e;nz&#x2003;&#x2003;(I).

Polarizing plate, liquid crystal panel, and liquid crystal display

An adhesive film for underfill excellent in relaxation effect of the stress generated in the above semiconductor element and the wiring circuit board and in the connecting electrode parts and also excellent in reliability of electrical connection between the semiconductor element and the wiring circuit board.

Adhesive film for underfill and semiconductor device using the same

The present invention provides an optical semiconductor device comprising: a wiring circuit board; at least one optical semiconductor element mounted on the wiring circuit board; resin layer A that encapsulates the at least one optical semiconductor element therewith; and resin layer B interposed between the resin layer A and the wiring circuit board, and having a tensile modulus as measured at 30&#xb0; C. of 0.001 to 0.4 GPa.

Optical semiconductor device

An adhesive film for underfill which relaxes the stress formed in the wiring circuit substrate, semiconductor element and electrode parts for connection. The adhesive film is a quickly hardening type, and forms a highly heat resistant sealing resin layer quickly between the wiring circuit substrate and semiconductor element of a semiconductor device.

Growing community of inventors

Ibaraki, Japan

Kazuki Uwada