本研究主要使用噴射式大氣電漿束,進行矽晶片之電漿蝕刻。於使用不同之氟碳單體於改變功率、氣體流率、工作距離及混合氣體比例下,於外管通入四氟甲烷與八氟環丁烷與氬氣電漿進行混合,並進行電漿蝕刻。此外,搭配高解析度紅外線熱感應器可印證本研究為低溫電漿製程。藉由表面輪廓儀(Surface Profilometer, α-step)探測蝕刻之深度與二維、三維表面形態,並搭配掃描式電子顯微鏡(Scanning Electron Microscopy, SEM)印證其電漿蝕刻後,矽晶圓表面之形態。於通入八氟環丁烷流率為250 sccm且工作距離於6 mm時,蝕刻速率可達7.2 μm/min。利用噴射式大氣電漿束接觸與不銹鋼遮罩搭配之矽晶圓,可於矽晶圓之表面蝕刻微米級之蝕刻圖案,其蝕刻之圖形直徑小於50 μm。
In this study, research effort was given to the study of atmospheric-pressure plasma etching with octafluorocyclobutane and tetrafluoromethane monomers. A capacitive coupled radio frequency (RF) double-pipe atmospheric-pressure plasma jet is used for the etching process. An argon carrier gas is fed through the atmospheric-pressure plasma source. Etchings were carried out on a Si wafer substrate. Si etching rates can be controlled by the etch gas composition and the plasma conditions. From the result, we could improve the etching rate to 7.2 μm/min at 250 sccm octafluorocyclobutane flow rate.