September 11, 2008
Whom it may concern
8-1, Aioi-cho, Ube-shi, Yamaguchi-ken
Ube Material Industries, Ltd. Inc.
1-2-8, Minoshima, Hakata-ku, Fukuoka-shi, Fukuoka-ken
Nippon Tungsten Co., Ltd. Inc.
Ube Material Industries, Ltd. Inc. and Nippon Tungsten Co., Ltd. Inc. are in collaboration toenter into a "MgO targets" business.
Ube Material Industries, Ltd. Inc. (president Abe Kenichi) and Nippon Tungsten Co., Ltd. Inc.
(president Shozo Yoshida) are in collaborative framework and succeeded in the development ofMagnesium Oxide(MgO) target with high purity and high-density which is indispensable forspintronics applications.
Ube Material Industries, Ltd. is the biggest producer of calcia related products derived fromlimestone which is abundant raw material in Japan and the domestic sole manufacturer ofmagnesia clinker (refractory material) which is made from magnesium raw material taken from sea
water.
In recent years, Ube Material has been concentrating on the specialty products, especially on theMgO fine products by original synthetic technology to ensure a stable supply of high quality MgOproducts to a market including most advanced electronic material and PDP protective films.
Nippon Tungsten Co., Ltd. is the advanced manufacture of rare metal, hardest metal, cemented
carbide tool, engineering ceramics, and processed products based on tungsten powdered metallurgy.
Especially the alumina titanium carbide system board material (aluminum-TiC) made by full use of
special sintering technology and processing technology has been widely used for magnetic heads inthe world, and has obtained high acclaim. It has become standard of the magnetic head slider
substrate material for hard disks (HDD).
The "MgO targets" succeeded by joint developments this time is by carrying out of the fullest
practical use of high purity MgO powder composition / refining technology which Ube Material has
cultivated for years, and the special sintering technology which Nippon Tungsten holds. By fusing
both manufacturing process, high purity (more than 4N5 or actually 5N) and high density (more than
99% or actually 99.4%) was realized, and simultaneously it became possible to mass-produce stably.
Ube Material is to be in charge of the sales of this item. The present suppliability is 1,000 units peryear.

Regarding the quality of the MgO targets, the MgO film forming evaluation for the HDD magnetic

heads have been evaluated since 2006 fiscal year by Canon Anelva Inc. which is sputtering
equipment manufacturer and obtained the evaluation that its performance is sufficient as MgOtargets. Furthermore, some HDD makers have completed the evaluation of performance, and it
reached the stage of the delivery start.
Moreover, the MgO targets are employed also for research and development of nonvolatilememory MRAM. According to Group Manager Shinji Yuasa, the independent administrative
institutions industrials technology Laboratory / electronics research section spintronics researchgroup, “ Regarding the market of the spintronics applicable field using MgO insulation film, it will riseby HDD magnetic head and nonvolatile memory MRAM and the full market will be formed by next
generation type large-capacity MRAM (spin RAM). Since formation of thin homogeneous films inlarge areas films particularly affects the yield for a memory application, it is expected that therequirement for target becomes severer. Furthermore, it has great potential, such as microwave
oscillators and spin transistors, as new applications except for nonvolatile memory."
Supposing a future MRAM formal market, Ube Material and Nippon Tungsten finish development ofhigh quality (high purity, high density) grade and enter into a MgO target business in collaborative
framework. From now on, we will aim at the joint evaluation with the MRAM users developing toform the full market by using the background of HDD use evaluation results.
In addition, please give inquiries on Product and Material to Ube Material which becomes adistributor，on Fabrication Technology to Nippon Tungsten which becomes a manufacturer.

MgO targets
Contact Information
Products and material :Ube Material Industries,Ltd Corporate Research & Development+81-836-31-0161 HP; http://www.ubematerial.com/
Fabrication technology:Nippon Tungsten Co.,Ltd Precision Machining Division+81-942-81-7760 HP; http://www.nittan.co.jp/en/