Toyota Jidosha Kabushiki Kaisha

Masayuki Ichiyanagi

Rentaro Mori

Akira Kiyama

Yoshio Honda

Nobuhiko Sawaki

Hiroyuki Nishiura

Shigehiko Sato

Hiroya Inaoka

Hidetoshi Kawai

Yoshiharu Hata

Takeo Sakurai

Reika Ogawa

Masaaki Matsunaga

Yasuyuki Yanase

This invention provides an engine cleaning composition for removing sediment formed in an engine. Such engine cleaning composition comprises: a dispersant containing a carboxylic acid and an amine; a chelating agent; a glycol solvent; and a naphthenic oil.

Engine cleaning composition

Light emitters and substrates for light emitters are provided to improve light-emitting efficiency and achieve improvement in crystal quality. A light emitter includes a single-crystal substrate, an oriented microcrystal layer, and a light-emitting layer. The light-emitting layer is made of a nitride semiconductor by means of a vapor-phase growth method. In the oriented microcrystal layer, the proportion of crystals, in which one of crystal axes is oriented with respect to the single-crystal substrate, is 5-9 out of 10 crystals. An average diameter of the crystal grains of the respective crystals, contained in the oriented microcrystal layer, is 1-1,000 nm. A light emitter may be equipped with an intermediate layer, a light-emitting layer, and a clad layer. These layers are formed on the oriented microcrystal layer by a vapor-phase growth method. The light-emitting layer contains microcrystal grains whose average grain diameter is 1-1,000 nm.

Substrate for forming light-emitting layer, light emitter and light-emitting substance

Growing community of inventors

Nagoya, Japan

Masayuki Ichiyanagi