What are the Different Types of Silicon Wafers
                     What are the Different 
Types of Silicon Wafers?
Silicon Specialist 
• Silicon- The second most abundant element on 
earth and the seventh most in the universe, after 
oxygen. In our today's world, there is a great 
range of gadgets and objects that use silicon or 
other semiconductor devices in some form. It can 
be found on televisions, laptops, mobile phones, 
smart gadgets, and other electronic devices.
• Silicon maintains a high level of stability and 
mobility at elevated temperatures, as well as at 
regular room temperatures. Due to the availability 
of holes or electrons, conducting electric current 
through the semiconductor becomes easier, 
depending on the type of doping the 
semiconductor has received.
What is a Wafer? 
• A wafer is a thin slice of semiconductor crystal 
that has nearly identical physical and electrical 
properties to its mother crystalline semiconductor 
substance but is used as a substrate for various 
electrical, electronic, and microelectronic devices 
and gadgets. It wouldn't be wrong to claim that all 
of today's technological advancements, 
particularly in the realm of electrical, electronics, 
and microelectronics are due to semiconductors.
Types of Silicon Wafers
• Here are some common types of silicon wafers,
SOI Wafers
• To achieve high breakdown voltage, low energy 
consumption, and high MEMS performance, thick 
SOI wafers are frequently employed in power 
devices and MEMS. Because of their SOI structure, 
this is possible. In order to get more exact control 
over the thickness of the SOI layer and the BOX 
layer, a bonding approach is adopted in the 
production of thick SOI wafers.
• These wafers are also in higher demand in cutting-
edge devices like intelligent power modules, which 
require a high breakdown voltage and low energy 
usage. MEMS constructed of SOI also have 
complicated 3-D structures like accelerometers 
and pressure sensors.
Epitaxial Wafers
• Epitaxial wafers are the classic wafers used to 
establish surface integrity by layering epitaxial 
silicon layers of varied thicknesses. For leading-
edge MOS devices, Thin Silicon Wafer CA is 
usually employed. Thick Epi or Multi-layered 
epitaxial wafers are employed in devices that 
primarily control electric power, and they help to 
improve energy consumption efficiency.
Polished Wafers
• Silicon wafers having one or both sides polished 
to a mirror finish are known as polished wafers. 
Polished wafers are famous in terms of flatness 
and cleanliness. They've built a solid reputation 
for high quality and precision, which is ideal for 
the ULSI period.
Hi- Wafers
• Hi-WAFER (Hydrogen Annealed Wafer) is heat-
treated in a hydrogen environment to provide a 
high BMD density that allows for guttering and a 
COP-free zone on the wafer's surface. These 
characteristics lead to the high quality of gate 
oxide.
Hyper Hi-Wafers
• Hyper Hi-WAFER is a high-end device with a finer 
technological node that has been developed. The 
wafer is annealed in the same Hydrogen 
atmosphere as Hi-WAFER, but it has smaller, more 
tightly regulated BMDs and greater surface 
integrity.
AT Wafers
• AT-WAFER is an annealed wafer that has been 
heat-treated in an Argon gas environment to 
prevent dopant out-diffusion from the wafer 
surface and to provide a flat resistivity profile in 
depth. In other ways, AT-WAFER is comparable to 
Hyper Hi-WAFER® in terms of quality.
Diffused Wafers
• The most common application of Diffused wafers 
is in electric power control systems. They help to 
increase energy consumption efficiency.
Summing Up
• Since the need for consumer electronics has 
soared, the demand for Silicon Wafers has surged. 
Among Silicon Wafers Manufacturing CA, 
Silicon Specialist is the best option if you need 
high-quality Silicon Wafers for your next project. 
For any questions, give us a call now, or order 
online!
THANK YOU