Wet Processing Equipment for Semiconductor Fabrication

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Wet Processing Equipment for Semiconductor
Fabrication

• Silicon Specialist LLC

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Silicon's Wafer Specialist, Wafer Processing
Services
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Introduction

• Semi-conductors are also known as chips or
  integrated circuits (ICs). They are the building
  block of all electronic devices due to their
  selective ability to conduct electric current.
  They fall in between conductors and insulators
  for their electrical conductivity. Their
  electrical conductivity is more than insulators,
  but less than conductors. Integrated circuits are
  highly popular due to their characteristics, and
  are widely used in all devices having ON/OFF
  switch.
• The chips substrate is metalloid element such as
  silicon, which is abundant in earth. In order to
  alter their conductivity properties, silicon is
  doped during IC manufacturing. Doping is a
  process of adding impurities to silicon to give
  it desirable quality of selective conductivity.
  Arsenic and boron are most widely used dopants.
  Each dopant has a different number of electrons
  and holes to create positive or negative charges.
  In the past electronic devices were bulky and big
  as they used vacuum tubes and crystal diodes. The
  replacement with semiconductor has led the
  devices to become compact, efficient, and less
  expensive.

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Semiconductor Industry

• Integrated circuits or chips are made of silicon,
  using a process known as wet processing. Due to
  its wide usage and popularity, only in 2015, the
  global revenue of semiconductors was 335
  billion. According to the Semiconductor Industry
  Association, every year the global semiconductor
  sales increase by 6.5. DC forecasts had
  indicated that by 2021, the sales increase in
  semiconductor market will increase 7.7 every
  year.

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Wafer Manufacturing

• Silicon wafers are thin, round slices produced by
  melting the semiconductor material, such as
  silicon, at a very high temperature of 1420C.
  The product of this heating is ingot a
  crystalized cylindrical block. A grinder is used
  to shape this chunk from which wafers can be
  sliced just like the loaf of bread is cut into
  slices. The sliced wafers are about 160-300 um
  thick.
• The fabrication process of integrated circuits
  comprises of hundreds of individual steps, which
  is the reason that hundreds of wafers are made
  simultaneously. Lets take a look at the
  equipment needed to produce wafers which become
  the basis of ICs.
• Specialized work stations are required for
  processing wafers. These work stations or units
  are known as wet chemistry benches. Specialized
  equipment is required to manufacture and produce
  Silicon Wafers CA. The process involves using a
  series of chemicals to clean, etch, mask,
  deposit, rinse, and dry, and create wafers which
  become the building block for ICs. The units are
  quite elaborated as they bring together
  temperature controllers, circulators, tanks, and
  baths. All these systems are placed together to
  make the process efficient and quick, and also to
  make sure that no contaminant is introduced
  during the transition phase. To make sure that
  there are not particulates or contaminants,
  filtration is carried out using some wet chemical
  steps.

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Wet Processing Stations

• Acidic and caustic substances can damage the
  silicon and wafers produced from it. To avoid
  that, specific wet bench design and material is
  applied. Polypropylene is the best material if
  acids or bases are to be used whereas stainless
  steel is necessary for solvents.

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Wet Process Quartz Bath

• To ensure clean solar cells and wafers,
  specialized cleaning stations are set up.
  Installations such as sinks, faucets and spray
  guns made available. To allow spilled acids
  run-off deck surfaces are perforated. Likewise,
  filter units are installed to allow fumes
  exhaustion. In an integrated bench, there are
  built-in light and filter module. Whereas, the
  modular bench requires separate ordering of these
  components.
• To keep a station safe from corrosive chemicals,
  the Solvent Spray Booth is made of stainless
  steel.

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Conclusion

• Wafer manufacturing is a demanding job which
  needs specialized equipment as well as qualified
  staff to make wafers. At silicon specialist, we
  offer high-quality Silicon Wafers Manufacturing
  CA. Whether you need standardized chips or custom
  made chips, we are just one call away. To get a
  quote, give us a call.

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