Theplaneproblemofacrackterminatingattheinterfaceofabimaterialpiezoelectric,andloadedonitsfaces,istreated.Theemphasisisplacedonhowtotransformthisproblemintoanon-homogeneousHilbertproblem.Tomakethederivationtractable,theconceptoftheaxialconju-gateisintroducedandrelatedtothecomplexconjugate.Theanglebetweenthecracklineandtheinter-facemaybearbitrary.Numericalresultsaregiventoillustratethestresssingularityatcracktip.