A three-dimensional asymptotic scheme that combines the transfer matrix met
hod and the asymptotic expansion technique is used to analyze thermo-electr
o-mechanical deformations of a piezothermoelastic laminate with surface tra
ctions, electric potentials, and temperatures specified on its top and bott
om surfaces. The scheme results in a hierarchy of two-dimensional equations
with the same homogeneous operator for each order. For an elastic problem,
the homogeneous operator reduces to that for classical thin-plate equation
s. Results computed for a simply supported rectangular plate with edges gro
unded are found to be in excellent agreement with the exact solution of the
problem.