Why should the wafer cut side, cut out edge Jiaosha
In a word, the standard combination of the main alignment and the alignment of the wafer will tell the user what type of conductivity it is and what it isWant to help you, hope to adopt
To determine the crystal, cutting the adhesive carbon or glass, mounted on the fixed equipment.In simple terms is to determine the crystal direction, in order to facilitate future cutting, design graphics to consider this point, and then ask a little deeper, it is necessary to look at the book.Transistors in general with 111 sides, MOS general 110The reason for this is related to doping, corrosion and other post production, but also the activity of different layers of electrons is different, potential energy is not the same.
In fact, early silicon is not cutting edge, but with the development of microelectronics industry began the following reasons: cutting edge, W2) i: J n$W% L* M1 s `&;1, n can do a plurality of microelectronic devices on the wafer, cut down, and there is a crystal to crystal growth requirements, cutting along a direction for cutting chaos crack, cleavage is the professional said. The cutting edge tells you the direction of cleavage.2, N type and P type silicon wafer, a standard trimming is also inform you that it is n type or P type electrical characteristics, electrical characteristics, u$J2 z/ h 9 - O3, microelectronics production has been automated, such as lithography exposure if there is no cutting edge positioning, then the mask plate and the chip will be a difference of 180 degrees or a certain location, production efficiency will be very low...,4, the use of a lot of silicon, in addition to n/p also have crystal direction, for example, do MEMS requires corrosion anisotropy will be used <110> crystal direction, and MOS products in order to reduce the influence of the surface state requirements with <100> crystal...
