Mitsui Petrochemical Industries, Ltd.

Mitsui Chemicals, Inc.

Junichi Yoshitake

Hiroaki Kitani

Norio Kashiwa

Takeshi Muranaka

Shigeru Katayama

Kaoru Tominaga

Masaaki Kawasaki

Akira Mizuno

Tooru Yamanaka

Shuji Minami

Yoshinori Akana

Kenichi Tominari

Michiharu Suga

Yukari Hattori

Shigeki Nagamatsu

Hideo Ishikawa

Masayuki Kondoh

A process for manufacturing a package of a semiconductor device, and providing a semiconductor device in which a vapor-impermeable moistureproof plate is embedded in a bottom surface of a hollow package or an inner surface wallthicknesswise therefrom to provide moisture-proofness.

Method of manufacturing a semiconductor device with an airtight space

This invention relates to a package construction of a semiconductor device, and provides a semiconductor device in which a vapor-impermeable moistureproof plate is embedded in a bottom surface of a hollow package or an inner surface wallthicknesswise therefrom to provide an excellent moisture-proofness in terms of the package construction.

Semiconductor device with an airtight space formed internally within a

Hot-melt adhesive

In accordance with the present invention, there are provided photo-recording media comprising photochromic compounds having been dispersed or dissolved in stretched films or nematic liquid crystals, the transition moment of light absorption of said photochromic compounds being orientated in a definite direction. In the photo-recording media as provided, an information recorded in the photochromic compounds can be read out without destroying the same.

Photo-recording media and photo-recording method

An .alpha.-olefinic random copolymer containing an .alpha.-olefin component having 5 to 10 carbon atoms and an .alpha.,.omega.-nonconjugated diene component having 6 to 20 carbon atoms, and optionally, a straight .alpha.-olefin component having 2 to 20 carbon atoms, wherein the copolymer comprises:

.alpha.-olefinic random copolymer and production process thereof

A branched alpha-olefinic polymer composition having excellent melt flowability, good moldability and excellent melt tension and comprising at least two branched alpha-olefinic polymers each composed of (A) recurring units derived from a branched alpha-olefin containing 5 to 10 carbon atoms and having a branch at the 3-position or a position of a higher number and (B) recurring units derived from a linear alpha-olefin containing 2 to 20 carbon atoms; and a process for producing this polymer composition by a multiplicity of polymerization steps using a catalyst formed from (A) a highly stereoregular titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredient, (B) an organoaluminum compound and (C) an electron donor.

Branched alpha-olefin polymer composition and process for its production

Polyethylene composition

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Sodegaura, Japan

Junichi Yoshitake