發明
美國
12/913,818
US 8,671,531 B2
具高C軸取向之氧化鋅壓電薄膜之製作方法MANUFACTURING METHOD FOR A ZINC OXIDE PIEZOELECTRIC THIN-FILM WITH HIGH C-AXIS ORIENTATION
國立中山大學
2014/03/18
一種具高C軸取向之氧化鋅壓電薄膜之製作方法,其係包含提供一基板,該基板係具有一本體、一二氧化矽層及一氮化矽層;形成一底電極層於該氮化矽層;圖案化該底電極層;濺鍍一氧化鋅(Zinc Oxide, ZnO)層於該氮化矽層及該底電極層上,濺鍍該氧化鋅層之濺鍍參數係包含基板溫度、氧氣/氬氣含量比、濺鍍功率及工作壓力,其中基板溫度可為250至350度、氧氣/氬氣含量比例為20%至25%、濺鍍功率可為150至250瓦、工作壓力可為5×10-6至7×10-6 Torr;圖案化該氧化鋅層;形成一金屬層於該氮化矽層及該氧化鋅層;圖案化該金屬層以顯露出該氧化鋅層;形成一上電極層於該氧化鋅層及該金屬層;移除該金屬層及在該金屬層之該上電極層,在該氧化鋅層之該上電極層係可被保留;以及圖案化該氮化矽層以形成ㄧ可顯露該本體之凹槽。 A manufacturing method for Zinc Oxide(ZnO) piezoelectric thin-film with high C-axis orientation comprises the steps of providing a substrate having a base, a SiO2 and Si3N4 layer; forming a bottom electrode on Si3N4; patterning the bottom electrode; sputtering a Zinc Oxide layer on the Si3N4 and the bottom electrode, sputtering characteristics for sputtering Zinc Oxide layer includes substrate temperature, oxygen/argon ratio, RF power and working pressure, wherein substrate temperature is within 250 to 350 degrees, oxygen/argon ratio is within 20 % to 25 %, RF power is within 150 to 250 watts and the work pressure is within 5×10-6 to 7×10-6 Torr; patterning the Zinc Oxide layer on the Si3N4 and Zinc Oxide layer; patterning the metallic layer to reveal the Zinc Oxide layer; and the top electrode layer formed on the Zinc Oxide layer may be remained; and patterning the Si3N4 to form a recess that reveals the base of the substrate.
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