Window Materials for High-class watches:

Sapphire Substrates for Blue and White LEDs:

Substrates for Epitaxial Growth:

We can offer you such substrates of single oxides that are the most suitable for epitaxial growth of superconductors, compound semiconductors, dielectrics, etc.

You can choose any of our sapphire substrates that best fit for your needs of the crystal system, lattice constant, dielectric, etc. Our advanced precision processing technologies can provide you with our finished products which have such high-quality surface of sapphire substrates that has no flaw nor distorted layers of processing. So, please do not hesitate to consult with us regarding such orientation, form, off-axis substrates, especially specified substrates, etc.

We can also offer you such STEP substrates that have extremely high precision surface, composed of STEPs and a terrace flat at the atomic level. These STEP substrates are made by our original technology which we have developed jointly with the Tokyo Institute of Technology. They are definitely indispensable for adequate growth of epitaxial films.

YSZ: Yttria Stabilized Zirconia LSAT: (La_0.3Sr_0.7)(Al_0.65Ta_0.35)O₃

Vapor Deposition Sources for Alumina Coating:

Item	ES-0510	ES-1020	ES-1035	CS-1030	D13H700T60
Form	Crush type	Crush type	Crush type	Cutting type	Semidisc type
ParticleDiameter	0.5-1.0mm	1.0-2.0mm	1.0-3.5mm	1.0-3.0mm	13mm,15mm, 18mm,20mm

Window Materials for Transmitting IR and UV Ranges:

Sapphire windows can transmit a wide range of light ranging from infrared rays (IR) to ultraviolet rays (UV). So, they are widely used for a variety of applications.

• < IR Range >

  Silica glass starts its internal absorption from IR of 2㎛ and then attenuates its transmittance. In contrast, sapphire is stable in transmitting light, so that it is quite suitable for the window materials for various types of IR sensors.

  Examples of applications:

  NDIR gas analyzers, fire detectors, water detectors, noncontact temperature measurement, human detectors, etc.

• < UV Range >

  Sapphire is excellent in thermostability and corrosion resistance as compared with silica glass, so that it is the most suitable for applications against UV in the environment under severe conditions. At the same time, it does not deteriorate like silica glass with long-hour lighting of an excimer lamp (172nm).

  Examples of applications:

  UV hardening, sterilization, chemical concentration meters, photolithography, fire alarms, various types of UV lamps, etc.

Window Materials for Preventing Scratches:

As sapphire is used for the window materials of wristwatches, it is an excellent material that has a property of high abrasion resistance (Mohs hardness: diamond=10, sapphire=9). So, it is widely used as the industrial materials for preventing scratches.

Window Materials under High Temperature and High Pressure:

You can apply sapphire for the window materials which are used in a severe environment under high temperature and high pressure. Its melting point is 2040 ℃ and its strength is more than 5 times as strong as silica glass.

So, you can use sapphire as a view port in the supercritical environment under the condition of high temperature and high pressure. Incidentally, its thermal conductivity is 40 times as much as glass and it can conduct heat nearly as fast as stainless steel.

Parts for Manufacturing Equipment of Semiconductors:

Sapphire is an excellent material highly resistant against chemicals and does not melt down by such industrial chemicals as those acids and alkalis which are used in the manufacturing processes of semiconductors. So, it is widely used as the view ports of etching apparatus, ashing equipment, diffusion furnaces, etc. It is also used as those tubes which discharge the activated plasma gas used for etching. Furthermore, the purity of sapphire itself is more than 99.99%, so that it is widely used for jigs and parts in the manufacturing lines of semiconductors.

Parts for Medical Instruments:

Sapphire is a material of very high purity and is not susceptible to deformation, so that it is being studied to apply it for the parts of medical instruments.

Results of Analyzing Impurities in Sapphire Crystals of High Purity (ppmw):

Ba＜0.1　Ca＜0.1　Cd*＜3　Cr^*＜2　Cu＜2　Fe＜1　Hg^*＜2　K＜1　Mg＜0.1　Mn＜0.5

Mo＜5　Na＜1　Pb^*＜10　Si＜10　Sr＜0.1　Ti＝1.8　W＜5　Zn＜1　Zr＜1

^*RoHS designated elements (Results of analyzing impurities according to the ICP-AES)

Sapphire Laser Caps (with Coating) for Optical Communication:

We also offer sapphire laser caps as the window materials for semiconductor laser packages. Sapphire is a material of high strength which does not deteriorate under any environmental conditions and is excellent in thermal conductivity. So, it is the most suitable for such a trunk line of electrical transmission system that requires high-power lasers and the performance of high reliability.

At the same time, our products are metalized so as to ensure their high strength and airtight, so that it is easy to join them by Au soldering. Besides, their beam axis accuracy is so high that the dispersion of a polarization extinction ratio is narrow and their optical properties do not deteriorate by our AR coating of high transmission and high reliability. We can also respond to your request for such items of special form that you especially specify for square windows, tapered items, etc.

Sapphire Prisms and Lens:

We also process various kinds of prisms by molding and optically polishing our sapphire materials. We finish the polished surface to the highest quality of flatness λ /4 – λ /10. We set the optical axis strictly following your specification, so that you cannot see such birefringence as particular to sapphire crystals. Furthermore, we can respond to any of your request for various types of SR processing and aspheric surface processing by using our curve generator.

Large-size Sapphire Windows:

Thanks to the TSMG method that we have developed by ourselves, we are producing large-size sapphire boules the size of which is the largest in Japan. So, we can offer you various sizes of sapphire products. They are also crystals of extremely high quality, so that you can use them for a variety of applications.

• TSMG boules (about the size φ300mm x 300mmL)
• The size of products that we can cut out:
  About the size φ0.3mm x 0.05mmt - φ270mm x 270mmL
  About the size □0.3mm x 0.05mmt - 300mm x 200mm x 20mmt

Our Unique Products:

These are our unique products made of sapphire or ruby for non-industrial use. We are always creating new novelty products.