Products for Gold and Silicon layers

Daicure SD-661 and SD-645 are qualified, approved and used by many major DVD manufacturers in the world for the application of DVD-5, 10 and DVD-9 with Gold or Silicon semi-reflective layers.

Water droplets phenomenon

It is known that water droplets are generated in between gold semi-reflective layer and polycarbonate after cooling down the disc from chamber conditions (e.g. 80°C, 80%RH, 96 hrs.).

SD-661 and SD-645 are designed to prevent this phenomenon.

These pictures show water droplets that are generated in between Au and PC:

Technical Information
    SD-661   SD-645
before curing:        
Viscosity:
Surface Tension:
Reflective Index:
   590 mPa.s
38 mN/m
1,50 n D25		   520 mPa.s
38 mN/m
1,50 n D25
after curing:        
Tg
Modulus
    30°C
    50°C
    75°C
   100°C
 
Shrinkage on curing		   10°C
 
   2 MPa
   4 MPa
   6 MPa
   6 MPa
 
6,7%		   19°C
 
12 MPa
   8 MPa
   9 MPa
   9 MPa
 
6,9%

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