Wafer

Various wafers

The silicon wafer which it was processed etching into. It is a principle same as CDs with a structure color origin to shine in rainbow color

Wafer [¹], wafer [²], wafer [³], wafer [⁴], wafer [⁵], wafer [⁶] [⁷] (British: wafer) are materials of the semiconductor element production. It is the discal board which sliced a columnar ingot made with material such as the single crystal silicon which managed the composition highly thinly. The name comes from the wafer of the confectionery.

Table of contents

Shape

I enlarge it in diameter with a year that there are some diameter of wafer to 50mm -300mm and can cut and bring down many integrated circuit chips from one piece of wafer if this diameter is big. A silicon wafer of 300mm in diameter was put to practical use from about 2000 and occupied approximately 20% of the silicon wafer production amount in 2004.

I am made from convenience of the handling in the process of manufacture to 0.5mm around -1mm, and, in the case of a general silicon wafer, the outside size is standardized in trade group such as SEMI (English version), and, in the case of 150mm in diameter (6 inches), the thickness of the wafer is done with thickness 0.775mm at thickness 0.725mm, 300mm (12 inches) at thickness 0.625mm, 200mm (8 inches). The thickness clearance is +-0.025mm.

The straight line part called the orientation flat [⁸] or a notch called a notch is established on the lap to merge the direction of the wafer during a process. In addition, the wafer is sliced along specific crystallographic orientation so that it is, and a notch position of cage Fra is fixed at a direction most suitable for the operation of the semiconductor element which crystal structure produces by conductive model and crystallographic orientation.

Kind

• Silicon wafer
• SiC (silicon calcium carbide) wafer
• Sapphire wafer
• Compound semiconductor wafer
  • GaP (gallium phosphide) wafer
  • GaAs (gallium arsenide) wafer
  • InP (indium phosphide) wafer
  • GaN (gallium nitride) wafer

Main maker

•   The Shinetsu semiconductor world first place
•   The SUMCO (Mitsubishi Sumitomo silicon) world second place
•   The M E M sea electronic material (English version) world third place
•   It is the fourth place of the world (old ヴッカー sill fatty tuna Nic AG) sill fatty tuna Nic (German version)
•   SUMCO TECHXIV (old Komatsu electron metal)
•   Coors technical center (old Toshiba Ceramics → Covalent Materials)
•   Showa Denko
•   LG silt Ron (old silt Ron)

Source

1. ^ Product information Shin-Etsu Chemicalなど
2. ^ Product information SUMCO、Product information Coors technical centerなど
3. Sumitomo Metal Industries of the ^ past
4. ^ Press release Product research institute など
5. ^ IT glossaries of terms
6. ^ Technical information Sumitomo Metal Industriesなど
7. ^ Wafer processing serviceITESなど
8. ^ British: orientation flat, cage Fra

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