Ko tenei ahua o te hiko kauwhata he mea hanga mai i te kohu hinu.Ka whakaaetia te kawe i te kiato o naianei iti iho i te 12~14A/㎡.Ko te tikanga ka whakamahia i roto i te oumu hiko hiko mo te hanga maitai, te hanga silicon, te hanga ūkuikui kowhai etc.