When buying wafers for the semiconductor market, the cost of the silicon wafers and their inherent quality are both crucial factors. The manufacturing process is one that is highly complicated and tedious. As with any goods, quality and price do vary so know the market and only buy from a manufacturer that produces quality silicon wafers.
Silicon is an element that is abundant in nature,
is non-metallic and gray, and has a unique characteristic that has helped transform the world we live in. This characteristic is silicon's ability to conduct electricity. Being able to conduct an electrical charge has made it the perfect material for the semiconductor industry. Without this element, it is unlikely we would have seen the revolution in digital equipment and communication systems that has taken place over the last decade. Silicon wafers must adhere to stringent specifications dependent upon the task they are going to perform.
If you are involved with a business that buys wafers for the semiconductor market, there are a number of important considerations that should always be at the forefront of your mind. The cost of the products and their inherent quality are both crucial factors. As with most commodities, the price of silicon does fluctuate depending upon external forces such as the global economy, availability of raw material, as well as political decisions. It is essential that you familiarize yourself with the issues that impact cost to ensure that your business purchases these products at a price that yields maximized profits.
It should be understood that there are a number of different mechanical specifications for the wafers sold today, take for example: diameter, thickness, and the variation of the thickness. For a wafer to function correctly, it should be of a uniform specification, with no room for deviation or error. Other important factors include the flatness, edge, and bow, all of which should also be uniform. Each wafer needs to be completely smooth and devoid of any markings caused during the manufacturing process and
thin film deposition. Make sure you buy from a manufacturer which produces only quality silicon wafers that adhere to these specifications.
Each and every silicon wafer has to be particle-free. If there is a single particle on a polished wafer this will impact its functionality. For this reason, calibration usually involves a traceable particle standard to determine quality and cost.
There are a number of different grades used to classify wafers. Those that are larger than one hundred and fifty millimeters are usually divided into process test and mechanical test varieties. The latter are used predominantly for equipment designed for testing, and have an emphasis on structural and dimensional characteristics.
A process test wafer, often referred to as a monitor wafer, is the type utilized for semiconductor fabrication and process monitoring, there are also other wafer grades, including particle grade. Particle silicon wafers are mainly designed to be used for the measurements of actual particles. Knowing the difference in types of wafers will help your company navigate the market and make comparisons in price much easier.
The manufacturing process is one that is highly complicated and tedious. It involves a number of sequential processes that are required to create an electronic circuit. As the demand for semiconductors continues to rise, and at an incredibly fast rate, the companies involved with the manufacturing of silicon wafers are barely able to keep up with demand.
If involved with this industry, it is important to understand the complete manufacturing process. As with any goods, quality and price do vary, and will continue to do so in the future even as new production techniques are developed and implemented.
