The piezoresistive coefficients of single crystalline diamond (SCD) were measured experimentally.
The crystal orientation dependence of piezoresistivity in B-doped SCD films was definitely observed.
The shear piezoresistive coefficient in B-doped SCD is exceptionally large due to its crystal orientation anisotropy.
The shear piezoresistive coefficient in SCD was larger at lower B/C ratio.