一般有层压纸胶板、层压布被板、塑料、陶瓷、玻璃和表面经过绝缘处理的铜、铝和铝合金等i这种表面经绝缘处理的金属基体，应具有足够的表面绝缘性，这种骨架基体具有良好的散热性，也易于成形。 The general has a laminate sheet of paper, cloth, plastic, laminated plates being, glass and ceramic surface by insulation treatment of copper, aluminum and aluminum alloy I the surface insulated metal substrate, should have sufficient surface insulation, this framework substrate with good heat dissipation, but also is easy to be formed.
       骨架是线绕电位器电阻体的绝缘支承体。基体(或基片)是非线绕电位器电阻体的支承体。 骨架和基体通常用绝缘性能良好的材料制成，要求耐热、耐潮、电绝缘性好，化学稳定性和导热性好，并只有一定的机械强度。The skeleton is a wire-wound potentiometer resistor insulating supporting body. Matrix ( or substrate) is a non - wirewound potentiometers resistor support. Cytoskeleton and matrix generally good insulation performance, material requirements, resistant to moisture, heat, good electric insulation, chemical stability and good thermal conductivity, and only certain mechanical strength.