Ubhedu lunokumelana nokugqwesa okugqwesileyo kwindawo ezomileyo, kodwa ithanda ukwenza ipatina kwindawo ephezulu-yokufuma okanye isulfure{1}equlathe ubume berhasi, nto leyo ekhokelela ekonyukeni kokunganyangeki. Umphezulu we-aluminiyam uthande ukwenza ifilimu eshinyeneyo ye-oxide, enokuthintela ukubola ngakumbi. Nangona kunjalo, ukuxhathisa kwefilimu ye-oxide (malunga ne-10⁻⁶Ω·cm²) iphezulu kakhulu kunoko we-copper substrate (10⁻⁶Ω·cm²), kwaye kufuneka iphuculwe nge-tin plating, i-nickel plating okanye unyango lwe-anodic oxidation.
Ngokubhekiselele kwimpembelelo yeqondo lokushisa kwi-conductivity yombane, i-coefficient yokushisa yokumelana nobhedu (0.0043 / degree) iphantsi kune-aluminium (0.0041 / degree), kodwa i-coefficient yokwandiswa kwe-thermal ye-aluminium (23.6 × 10⁻⁶/ degree) yi-1.4 ngamaxesha e-copper. Kwiimeko ezinokutshintsha kweqondo lokushisa okukhulu, ukwandiswa kwe-thermal kunye nokucutshungulwa kweentsimbi ze-aluminium zibonakaliswe ngakumbi, ezinokubangela ukukhululeka kwiindawo zokudibanisa. Oku kunokuncitshiswa ngoyilo lwesakhiwo (njengokugcina izithuba ezandisiweyo) okanye ngokusebenzisa izihlanganisi eziguquguqukayo.