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Aluminium Oxide 

Al2O3 or Sapphire has many different applications. From Patterned Sapphire Substrates (PSS) for HBLEDs, gate dielectric on GaN HEMTs, wear resistant coatings and barrier layers it's hardness and electrical characterisitics make it the of choice. It may be deposited using Atomic Layer Deposition (ALD) or Ion Beam Deposition (IBD). It can be etched using Inductively Coupled Plasma (ICP) and Reactive Ion Etching (RIE).

May be dry etched using the Inductively Coupled Plasma (ICP) process technique.  plasma density achieved etch rate for tough materials. Patterned Sapphire Substrate (PSS) uses process expertise to demonstrate good heat control and achieve optimum feature height and excellent CD control.

 

Patterned Sapphire Substrate (PSS) Etch

Patterned Sapphire Substrate (PSS) uses process expertise to demonstrate good heat control and achieve optimum feature height and excellent CD control.

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Ni masked  Al2O3  features.

 

 

 

Patterned Sapphire Substrate (PSS) Etch

Excellent stoichiometry with competitive deposition rate. Etch source available for pre-clean.

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Smooth etch and good control of etch depth.

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Excellent quality and damage, even at deposition .

  • Wafer size: up to 200mm
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SEM image of a 80 nm remote plasma ALD Al2O3 in 2.5 mm wide trenches with aspect ratio ~10 deposited in the FlexAL reactor, courtesy of Eindhoven University of Technology & NXP.


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