Sumitomo Chemical Company, Limited

Fujitsu Corporation

Fumi Yamaguchi

Makoto Kitano

Takanobu Noguchi

Isao Yahagi

Takenori Osada

Keiji Watanabe

Miwa Kozawa

Masato Ueda

Toshihiro Ohnishi

Shoichi Suda

Michitaka Morikawa

Shuji Doi

Yasuaki Abe

Manabu Sasaki

Yukio Fujii

Makano Kitano

A positive type resist composition having an alkali-soluble siloxane polymer expressed by the following Formula (1), a photosensitive compound, and a 1 &#x3bc;m thick resist film formed of the positive type resist composition which has 5% to 60% of transmittance to i-line radiation;   Preferably, 0.25&#x2266;a&#x2266;0.60, and 0&#x2266;c&#x2266;0.25. The composition is preferably used in a resist film undergoing oxygen plasma etching.

Alkali-soluble siloxane polymer, positive type resist composition, resist pattern, process for forming the same, electronic device and process for manufacturing the same

A positive type resist composition having an alkali-soluble siloxane polymer expressed by the following Formula (1), a photosensitive compound, and a 1 &#x3bc;m thick resist film formed of the positive type resist composition which has 5% to 60% of transmittance to i-line radiation; Preferably, 0.25&#x2266;a&#x2266;0.60, and 0&#x2266;c&#x2266;0.25. The composition is preferably used in a resist film undergoing oxygen plasma etching.

A hole transporting polymer having a specific Si-containing repeating unit represented by a formula (1) and specific molecular weight, an excellent hole transporting property, and superior durability and film-forming properties, and the organic EL device, using the bole transporting polymer having excellent light emitting characteristics are disclosed.

Hole transporting polymer and organic electroluminescence device using the same

Polymeric fluorescent substance and polymer light emitting device

An organic electroluminescence device which has a pair of electrodes, at least one of which is transparent or semitransparent, and at least one organic layer formed between the electrodes. The organic layer contains a hole transporting material and a light emitting material in the same or different layer. The hole transporting material contains at least one polysilane whose main chain skeleton is composed of a repeating unit represented by the general formula (1) and a repeating unit represented by the general formula (2): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted aralkyl group, Ar.sub.1 represents a substituted or unsubstituted arylene group and Ar.sub.2 represents a substituted or unsubstituted aryl group. The polysilane satisfies the expression 0.2.ltoreq.z.ltoreq.1 where a ratio of the number of the repeating unit (1) and that of the repeating unit (2) to the total number of the repeating units (1) and (2) are z and 1-z, respectively. The polysilane has a weight average molecular weight of not less than 5000 and a hole drift mobility of 10.sup.-3 -10.sup.-1 cm.sup.2 /v/sec. The organic EL device shows excellent characteristics of higher luminance and higher luminous efficiency at lower driving voltage.

Organic electroluminescence device

A polysilane is disclosed whose main chain skeleton has a repeating unit represented by the general formula (1): ##STR1## wherein R.sub.1 represents a substituted or unsubstituted alkyl cycloalkyl, aryl or aralkyl group; X is a atom having an unpaired electron or a group containing an atom having an unpaired electron and represents an oxygen atom, sulfer atom or a nitrogen atom-containing group represented by the general formula (2): ##STR2## wherein R.sub.2 represents a substituted or unsubstituted alkyl, cycloalkyl, aryl or aralkyl group; Ar.sub.1 represents a substituted or unsubstituted arylene group; and Ar.sub.2 represents a substituted or unsubstituted aryl group, a group having an aromatic amine skeleton or a group ethenylene skeleton; a process for producing the polysilane; and a dihalosilane which is the starting material therefor. The polysilane compound has an excellent moldability as a high polymeric material and a higher hole drift mobility as a hole transporting material.

Polysilane, its production process and starting materials therefor

Growing community of inventors

Ibaraki, Japan

Fumi Yamaguchi