Toyoda Gosei Co., Ltd.

Kobe Steel, Ltd.

Kazuhiro Ito

Masanori Murakami

Susumu Tsukimoto

Miki Moriyama

Mikako Takeda

Takashi Onishi

Masao Mizuno

Tatsuya Kabe

Toshifumi Morita

Naoki Shibata

Jun Ito

Koji Hirata

Yuhei Ikemoto

Yu Uchida

Teppei Watanabe

A method of fabricating semiconductor interconnections is provided which can form a Ti-rich layer as a barrier layer and which can embed pure Cu material as interconnection material into every corner of grooves provided in an insulating film even when the grooves have a narrow minimum width and are deep. The method may include the steps of forming one or more grooves in an insulating film on a semiconductor substrate, the recess having a minimum width of 0.15 &#x3bc;m or less and a ratio of a depth of the groove to the minimum width thereof (depth/minimum width) of 1 or more, forming a Cu alloy thin film containing 0.5 to 10 atomic % of Ti in the groove of the insulated film along a shape of the groove in a thickness of 10 to 50 nm, forming a pure Cu thin film in the groove with the Cu alloy thin film attached thereto, and annealing the substrate with the films at 350&#xb0; C. or more to allow the Ti to be precipitated between the insulating film and the Cu alloy thin film.

Method of fabricating semiconductor interconnections

A light emitting element having a light emitting element portion formed of a group III nitride-based compound semiconductor and having a layer to emit light. The light emitting element portion is formed by lifting off a substrate by wet etching after the light emitting element portion is grown on the substrate. The light emitting element portion has a lift-off surface that is kept substantially intact as it is formed in growing the light emitting element portion on the substrate.

Light emitting element and production method thereof

In a semiconductor device in which a group III nitride compound semiconductor layer is formed without a low temperature grown buffer layer provided on an undercoat layer formed by a metal nitride layer, the metal nitride layer is formed of reddish brown titanium nitride. The reddish brown titanium nitride can be obtained by causing nitrogen to be rich in the titanium nitride.

Semiconductor device having an undercoat layer and method of manufacturing the same

There is provided a fabrication method for interconnections, capable of embedding a Cu-alloy in recesses in an insulating film, and forming a barrier layer on an interface between the an insulating film and Cu-interconnections, without causing a rise in electric resistivity of the interconnections when fabricating semiconductor interconnections of the Cu-alloy embedded in the recesses provided in the insulating film on a semiconductor substrate. The fabrication method for the interconnections may comprise the steps of forming the respective recesses having a minimum width not more than 0.15 &#x3bc;m, and a ratio of a depth thereof to the minimum width (a depth/minimum width ratio) not less than 1, forming a Cu-alloy film containing Ti in a range of 0.5 to 3 at %, and N in a range of 0.4 to 2.0 at % over the respective recesses, and subsequently, annealing the Cu-alloy film to not lower than 200&#xb0; C., and pressurizing the Cu-alloy film to not less than 50 MPa to thereby embed the Cu-alloy film into the respective recesses.

Fabrication method for semiconductor interconnections

Growing community of inventors

Kyoto, Japan

Kazuhiro Ito