Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2254
標題: 磁偶合對堆疊IC的影響與應用
Influence and application of magnetic coupling for stack IC
作者: 劉茂誠
Liu, Mao-Chen
關鍵字: stack IC
堆疊IC
3D-IC
magnetic coupling
CMOS MEMS
立體晶片
磁偶合
微機電
出版社: 機械工程學系所
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摘要: 以標準CMOS製程為基礎,製作微元件與積體電路,其中微元件包含微電感與微可變電容,使用訊號產生器施加弦波訊號,至傳輸電感以產生磁場,並測試磁場與微元件間的耦合現象。後製程方面,使用乾蝕刻與濕蝕刻,乾蝕刻主要為移除矽基材,濕蝕刻主要為蝕刻結構的犧牲層,以釋放結構。利用乾蝕刻移除矽基材的蝕刻深度,以探討電感與矽基材的耦合關係。堆疊晶片使用傳輸電感所產生的磁場,獲得在低頻時晶片間的訊號傳遞方式;同時探討,傳輸電感施加交流訊號時,對感測器與積體電路穩定性的影響,並了解彼此物理性質與施加頻率的關係,最後以凝膠溶膠法製作氣體感測薄膜,當薄膜與晶片整合時,因磁場影響而產生錯誤動作,並且以此薄膜於受磁場與光功率激發時的發電狀態。 使用乾蝕刻移除矽基材,並利用濕蝕刻調整蝕刻深度,以控制基材與元件偶合效應,當蝕刻深度為70 μm,可使電感接近理想值,論文也提出,蝕刻深度與電感性能的關係,目的為可使電感與IC工作頻率搭配。晶片堆疊後,使用傳輸電感所產生的磁場,做堆疊晶片間的訊號傳遞與對CMOS元件、微感測器與微致動器的影響。其中接收訊號元件使用電感與電阻,由實驗結果可知,接收元件未工作於共振頻率時,電阻的接收效率優於電感,原因磁偶合型態時,電阻值決定輸出電壓量,此外並使用電感與電阻並聯以接收訊號,再以共源極放大電路,放大接收訊號。傳輸電感產生的磁場,對CMOS元件在低頻時,造成電感與電阻的電阻值隨頻率增加而下降;元件在高頻時,電感電感值不變,但電感電阻值隨頻率增加而增加。在微結構的電容方面,無論平板(變化面積)、指叉(變化介電係數)與金屬板(變化間距)形式,皆受磁場影響,甚至造成電容誤差9%。在氣體感測器方面,使用凝膠溶膠法製作氣體感測薄膜,並利用類電解方式,獲得於室溫中更靈敏的薄膜電阻變化量,使用此薄膜與IC整合,整合結果因感測薄膜與感測器電阻,皆受到磁場耦合影響,多晶矽電阻隨頻率上升而下降,感測薄膜則電阻無法預估,造成整合後的感測器,因磁場的關係,無法準確反應環境氣體的變化量。並使用氣體感測薄膜,以磁場與光功率激發,且將感測膜塗佈於,以CMOS晶片所製作的槽中,激發結果產生具方向性的發電效果。
The study investigates the influence of magnetic coupling in the stacked chips of IC (integrated circuits) and micro-devices. The micro-devices that include micro-inductors and micro-sensors are fabricated by using the commercial CMOS (complementary metal oxide semiconductor) process and the post-CMOS process. In order to obtain the suspended structures, the micro-devices use the post-CMOS process of dry and wet etching to etch the sacrificial layers and silicon substrate. The dry etching of RIE (reactive ion etching) is employed to remove the silicon substrate under the inductors in order to increase the resistance of the silicon substrate. The larger resistance can reduce the parasitic effect between the inductors and silicon substrate. The experiments show that the inductors are nearly ideal condition when the etching depth of the silicon substrate under the inductors is 70 μm. When the function generator applies a sine-wave to the transmission inductor of the stacked chips, the magnetic field is generated that it is used to investigate the effect of magnetic coupling for the micro-sensors and to transport the signals between two chips. The inductors and resistors are employed to receive the ac signals. The receiver components work with non-resonant frequency and the induced voltage is determined by the resistance of devices. Using parallel inductance and resistance, the method is not only enlarging the output signal but also increasing the received range. The common source circuit is used to amplify the output signal. The magnetic field of transmission inductor results in the CMOS components to change the physical properties, and the resistance value of the components at low frequency decreases with increasing the frequency of transmission inductor. At high frequency, the inductance value maintains a constant with increasing the frequency of transmission inductor. However, the resistance value of the inductor rise with increasing the transmission inductor frequency. In this work, the capacitive pressure sensors are manufactured and the sensors use the spacing change to detect the pressure. However, the magnetic field of the transmission inductor influences the capacitance of the capacitive sensors, and leading to the sensors can not work. According to our experiments, the capacitance of the capacitive pressure sensors produces a change of 9 percent owing to the magnetic field of the transmission inductor.
URI: http://hdl.handle.net/11455/2254
其他識別: U0005-1506200923403500
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-1506200923403500
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