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ADAS的主要功能僅由車內的兩個系統實現:
攝像頭系統:CMOS圖像傳感器獲取圖像,由處理器處理數據。處理器采用倒裝芯片BGA(FCBGA)封裝。
雷達系統:車內通常有三個雷達模塊。兩個在后保險杠上,一個在前格柵。每個模塊都有收發雷達信號的收發器和處理雷達信號的處理器。雷達收發器采用LDFO封裝,也有的采用倒裝芯片CSP(FCCSP)封裝。
直到幾年前,汽車中的大多數半導體元件都使用鍵合焊線工藝封裝。雖然鍵合焊線仍然是主流汽車芯片封裝,但ADAS模塊越來越多地使用了先進封裝,如倒裝芯片FCBGA、低密度扇出(LDFO)和倒裝芯片FCCSP。
目前,不論是自動駕駛(ADS),還是ADAS,車輛都要在所有條件下執行各種駕駛功能。為了實現這一點,車輛不僅要與內部復雜系統進行通信,還要與外部環境進行更多通信。未來的汽車技術將繼續使用越來越多的攝像頭、雷達和激光雷達。傳感器技術必須更強大,能夠處理更復雜的任務。汽車系統組件應提供更高的性能,以便以更高的速度處理更多的數據,并將延遲和功耗降至。因此,更精細的納米工藝就成為了半導體廠商的不斷追求。根據汽車各系統的功能不同,使用的工藝也不一樣。
值得一提的是,盡管芯片制造商已經使出了渾身解數來跟上摩爾定律的步伐,但進展越來越難,采用先進IC封裝技術已成為一種補救辦法,有助于在減小整體封裝尺寸的同時實現芯片的可擴展性、功能密度和異構集成。當然,ADAS等汽車應用也會從中受益。
駛向未來
ADAS的發展讓眾多駕駛員輔助功能得到了廣泛采用,不斷增強了整體駕駛體驗、安全性、舒適性和便利性。如Yole的分析師所說,進入新十年,“ADAS意味著正在幫助攀登2014年SAE定義的自動駕駛階梯,并贏得了“L2”、“L2+”和現在的“L2++”的華麗表演。但就自動駕駛而言,現實也許還不是一回事。”雖然如此,整個行業也在這一過程中為全自動車輛(AV)實現水平的自動化積累著更多的經驗。
3UF7982-0AA01-0
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