Shin-etsu Chemical Co., Ltd.

Hirofumi Kawazoe

Takehisa Minowa

Hajime Nakano

Yuji Kimura

Yasushi Takai

Noriaki Hamaya

Toshihiko Tsukatani

Takao Maeda

Masaru Konya

Junichi Nakayama

Kazuhiro Wataya

Masami Kaneyoshi

Isamu Fujioka

Provided is a method of producing a Mn-activated complex fluoride phosphor, the method including: mixing a red phosphor as a Mn-activated complex fluoride represented by the following formula (1):KMF:Mn&#x2003;&#x2003;(1)wherein M is one or two or more of tetravalent elements selected from the group consisting of Si, Ti, Zr, Hf, Ge and Sn and necessarily includes Si, with KMnFin solid state and optionally with a hydrogenfluoride represented by the following formula (2):AF.HF&#x2003;&#x2003;(2)wherein A is one or two or more of alkali metals and/or ammonium selected from the group consisting of Li, Na, K, Rb and NHand necessarily includes K, and n is a number of 0.7 to 4, in solid state; and heating the resulting mixture at a temperature of 100 to 500&#xb0; C. According to the present invention, it is possible to obtain a Mn-activated complex fluoride phosphor which can be used with smaller amount as compared to those according to the related art.

Mn-activated complex fluoride phosphor and method of producing thereof

A method for manufacturing MAlO:Eu,RE type long-lasting phosphor ceramics that is capable of producing the ceramics at a reduced raw material cost. In addition, a sintered product of a long-lasting phosphor having no yellow body color. More specifically, the method for manufacturing MAlO:Eu,RE type long-lasting phosphor ceramics in which M is an alkaline earth element and RE is a rare earth element other than europium, involving mixing a BAM (alkaline earth aluminate) phosphor, an alkaline earth compound, an aluminum compound and a rare earth compound to form a mixture, and then firing the mixture; and a white MAlO:Eu,RE type long-lasting phosphor resulting from the method.

Long-lasting phosphor ceramics and manufacturing method thereof

The present invention provides a production process for the production of an MAlO:Eu type long-lasting phosphor (M representing an alkaline earth metal). The process includes the steps of mixing a BAM (alkaline earth aluminate) phosphor with an alkaline earth compound and calcinating the resulting mixture.

Production process of long-lasting phosphor

A wafer has a rare earth oxide layer disposed, typically sprayed, on a substrate. It is useful as a dummy wafer in a plasma etching or deposition system.

Wafer

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Tokyo, Japan

Hirofumi Kawazoe