Wet etching

• Post Date:

  Dec 04,2009

• Expiry Date:

  Dec 04,2010

• Detailed Description:

  The first etching processes used
  liquid-phase ("wet") etchants. The
  wafer can be immersed in a bath of
  etchant, which must be agitated to
  achieve good process control. For
  instance, buffered hydrofluoric
  acid (BHF) is used commonly to
  etch silicon dioxide over a
  silicon substrate.
  Different specialised etchants can
  be used to characterise the
  surface etched.
  Wet etchants are usually
  isotropic, which leads to large
  bias when etching thick films.
  They also require the disposal of
  large amounts of toxic waste. For
  these reasons, they are seldom
  used in state-of-the-art
  processes. However, the
  photographic developer used for
  photoresist resembles wet etching.
  As an alternative to immersion,
  single wafer machines use the
  Bernoulli principle to employ a
  gas (usually, pure nitrogen) to
  cushion and protect one side of
  the wafer while etchant is applied
  to the other side. It can be done
  to either the front side or back
  side. The etch chemistry is
  dispensed on the top side when in
  the machine and the bottom side is
  not affected. This etch method is
  particularly effective just
  before "backend" processing
  (BEOL), where wafers are normally
  very much thinner after wafer
  backgrinding, and very sensitive
  to thermal or mechanical stress.
  Etching a thin layer of even a few
  micrometres will remove
  microcracks produced during
  backgrinding resulting in a the
  wafer having dramatically
  increased strength and flexibility
  without breaking
  Seeking coorparation with overseas
  semiconductor equipments
  manufacturers
  
  Our company is one professional
  manufacturer of semiconductor
  equipment in China, now we are
  searching for overseas excellent
  semiconductor equipment
  manufacturers,material enteprise
  and equipment parts manufacturers
  to cooperate.With the world
  ecnomic globalizing,it is not
  impossible for one company to
  monopolize highest technology and
  market in any field in any
  country, increasing global
  collaboration is the gold key to
  developing technology and
  expanding world market,seeking
  overseas topping partners to
  achieve win-win cooperation is one
  strategic plan of our company now
  and will continue.List company’s
  brief introduction,cooperation
  fields,cooperation
  modes,cooperation advantages and
  benefits as follows:
  
  Brief introduction:
  Suzhou CSE Semiconductor Equipment
  Technology Co., Ltd., is a joint-
  stock enterprise invested by CAS
  Suzhou Institute of Nano-tech and
  Nano-bionics and Beijing HL Co.,
  our major products are
  semiconductor equipments, solar
  photovoltaic equipments, LCD
  cleaning facilities, vacuum
  equipments and etc.; Depending on
  the high-tech R&D team of CAS
  Suzhou Institute of Nano-tech and
  Nano-bionics and HL’s skillful
  experience in related industries
  together, we occupied the middle
  market of semiconductor equipment
  rapidly and have owned steady and
  loyal customer groups.
  In inner semiconductor equipments
  field, we cooperated with country
  research institutes and entered
  8” wafer market firstly as one of
  the earliest and largest
  manufaturers.
  
  Cooperation fields:
  Semiconductor equipments and parts
  manufacturer;
  Solar photovoltaic equipments and
  parts manufacturer;
  LCD cleaning facilities and parts
  manufacturer;
  Semiconductor material enteprise;
  Others related companies;
  
  Cooperation modes:
  Technology cooperation;
  OEM;
  Providing sales and after sales
  sevice;
  Agency;
  
  Cooperation advantages:
  Professional skills in
  technology,producing and after
  sales;
  Professional sales experiences and
  steady customer groups;
  Topping professors of Suzhou Nano-
  tech institute as our partner;
  Vigorous support from Suzhou
  government;
  Advantaged geographical position;
  
  Cooperation benefits:
  Provide excellent and high cost
  performance products and service;
  Assist foreign companies entering
  China market;
  

• Company:

  Suzhou CSE Semiconductor Equipment Technology Co., Ltd.     [ China ]        

• Contact:

  Amy Chang

• Tel:

  +86-18913168552

• Fax:

  +86-18913168552

• Email:

  amychangcse@yahoo.com