Za a yi da babban-tsarki yumbu foda, da yumbu sanda an kafa ta bushe latsa ko sanyi isostatic latsa, sintered a karkashin high zafin jiki, sa'an nan daidai machined.Abubuwan yumbu da muke amfani da su yawanci sune Zirconia, 95% ~ 99.9% Alumina (Al2O3), Silicon Nitride (Si3N4), Aluminum Nitride (AlN) da sauransu.