I want to print a CuO paste on glass substrate (glass A) then reduce to Cu and sinter in 5%H2-N2 at high temperature (higher than 600°C).

Because the CTE of glass A is only about 3.5*10^-6/K, the large CTE mismatch cause the pattern brake. Therefore, I want to pre-printing two glass layer composed of 50% glass A+50% glass B and 100% glass B first and sinter on glass substrate A. The CTE of glass B is about 12*10^-6/K.

I am not sure if this method can make the pattern sintered on the substrate without breaking.

Can anyone provide advice or other ideas about it?

Thanks.