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  • 葉青峻
    葉青峻 2021/03/10 10:12

    常見的半導體材料有矽、鍺、砷化鎵等
    /
    晶片測試
    晶片處理高度有序化的本質增加了對不同處理步驟之間度量方法的需求。晶片測試度量裝置被用於檢驗晶片仍然完好且沒有被前面的處理步驟損壞。如果If the number of dies—the 積體電路s that will eventually become chips—當一塊晶片測量失敗次數超過一個預先設定的閾值時,晶片將被廢棄而非繼續後續的處理製程。
    /
    晶片測試
    晶片處理高度有序化的本質增加了對不同處理步驟之間度量方法的需求。晶片測試度量裝置被用於檢驗晶片仍然完好且沒有被前面的處理步驟損壞。如果If the number of dies—the 積體電路s that will eventually become chips—當一塊晶片測量失敗次數超過一個預先設定的閾值時,晶片將被廢棄而非繼續後續的處理製程。

    /
    步驟列表

    晶片處理
    濕洗
    平版照相術
    光刻Litho
    離子移植IMP
    蝕刻(干法蝕刻、濕法蝕刻、電漿蝕刻)
    熱處理
    快速熱退火Annel
    熔爐退火
    熱氧化
    化學氣相沉積 (CVD)
    物理氣相沉積 (PVD)
    分子束磊晶 (MBE)
    電化學沉積 (ECD),見電鍍
    化學機械平坦化 (CMP)

    IC Assembly and Testing 封裝測試
    Wafer Testing 晶片測試
    Visual Inspection外觀檢測
    Wafer Probing電性測試
    FrontEnd 封裝前段
    Wafer BackGrinding 晶背研磨
    Wafer Mount晶圓附膜
    Wafer Sawing晶圓切割
    Die attachment上片覆晶
    Wire bonding焊線
    BackEnd 封裝後段
    Molding模壓
    Post Mold Cure後固化
    De-Junk 去節
    Plating 電鍍
    Marking 列印
    Trimform 成形
    Lead Scan 檢腳
    Final Test 終測
    Electrical Test電性測試
    Visual Inspection光學測試
    Baking 烘烤
    /
    有害材料標誌

    許多有毒材料在製造過程中被使用。這些包括:

    有毒元素摻雜物比如砷、硼、銻和磷
    有毒化合物比如砷化三氫、磷化氫和矽烷
    易反應液體、例如過氧化氫、發煙硝酸、硫酸以及氫氟酸

    工人直接暴露在這些有毒物質下是致命的。通常IC製造業高度自動化能幫助降低暴露於這一類物品的風險。
    /
    Device yield

    Device yield or die yield is the number of working chips or dies on a wafer, given in percentage since the number of chips on a wafer (Die per wafer, DPW) can vary depending on the chips' size and the wafer's diameter. Yield degradation is a reduction in yield, which historically was mainly caused by dust particles, however since the 1990s, yield degradation is mainly caused by process variation, the process itself and by the tools used in chip manufacturing, although dust still remains a problem in many older fabs. Dust particles have an increasing effect on yield as feature sizes are shrunk with newer processes. Automation and the use of mini environments inside of production equipment, FOUPs and SMIFs have enabled a reduction in defects caused by dust particles. Device yield must be kept high to reduce the selling price of the working chips since working chips have to pay for those chips that failed, and to reduce the cost of wafer processing. Yield can also be affected by the design and operation of the fab.

    Tight control over contaminants and the production process are necessary to increase yield. Contaminants may be chemical contaminants or be dust particles. "Killer defects" are those caused by dust particles that cause complete failure of the device (such as a transistor). There are also harmless defects. A particle needs to be 1/5 the size of a feature to cause a killer defect. So if a feature is 100 nm across, a particle only needs to be 20 nm across to cause a killer defect. Electrostatic electricity can also affect yield adversely. Chemical contaminants or impurities include heavy metals such as Iron, Copper, Nickel, Zinc, Chromium, Gold, Mercury and Silver, alkali metals such as Sodium, Potassium and Lithium, and elements such as Aluminum, Magnesium, Calcium, Chlorine, Sulfur, Carbon, and Fluorine. It is important for those elements to not remain in contact with the silicon, as they could reduce yield. Chemical mixtures may be used to remove those elements from the silicon; different mixtures are effective against different elements.

    Several models are used to estimate yield. Those are Murphy's model, Poisson's model, the binomial model, Moore's model and Seeds' model. There is no universal model; a model has to be chosen based on actual yield distribution (the location of defective chips) For example, Murphy's model assumes that yield loss occurs more at the edges of the wafer (non-working chips are concentrated on the edges of the wafer), Poisson's model assumes that defective dies are spread relatively evenly across the wafer, and Seeds's model assumes that defective dies are clustered together.[25]

    Smaller dies cost less to produce (since more fit on a wafer, and wafers are processed and priced as a whole), and can help achieve higher yields since smaller dies have a lower chance of having a defect. However, smaller dies require smaller features to achieve the same functions of larger dies or surpass them, and smaller features require reduced process variation and increased purity (reduced contamination) to maintain high yields. Metrology tools are used to inspect the wafers during the production process and predict yield, so wafers predicted to have too many defects may be scrapped to save on processing costs.[26]

  • 吳信宏耳鼻喉科
    吳信宏耳鼻喉科 2021/06/03 19:50

    兩岸論述
    一五新觀點
    主条目:一五新觀點

    是由臺北市長柯文哲提出的兩岸觀點,試圖繞過九二共識的論述;因为在2015年提出,柯將其命名为「一五新觀點」,又被稱為「四個互相」或「五個互相」[101]。
    兩岸一家親

    因上海市委常委沙海林代表市長楊雄赴台北參加「2016台北上海城市論壇」,其「統戰部長」身分引發外界質疑。柯文哲表示,他「覺得還好」,台灣民眾之所以反彈,係因兩岸「文化隔閡」。「統戰」在台灣是被污名的名詞,但對岸認為統戰二字很正常[102]。柯文哲解釋,對岸政府為尊重台北,派出比副市長層級更高的官員,既然對岸願意派人來,我方當以禮待之,畢竟「兩岸一家親總比一家仇好」[103]。

    柯文哲競選辦公室發言人林昆鋒指出,早在2015年柯文哲已提過「兩岸一家親」的概念,且柯文哲的「兩岸一家親」定義非指政治狀態,其初衷是希望兩岸彼此諒解,因此柯文哲也提出「五個互相」原則(即一五新觀點),爭取順利舉辦大型賽會,並促成蔡英文以中華民國總統身份在台北世大運上台講話[104]。
    兩岸關係

    2019年6月6日,柯文哲接受中國評論通訊社專訪時指出,中華民國的政府組織有外交部、也有大陸委員會,這很清楚地說明「兩岸事務不是外交關係、不是國際關係,而是一個有專屬定位的兩岸關係」;兩岸需要互相交流、互相理解,「遵守體制,改善現狀」[105]。

    2021年3月28日,柯文哲對於中國新疆棉抵制潮的問題,受訪時表示:「兩岸關係是太平洋兩岸與台灣海峽兩岸之間的關係。是世界大事,反中在未來15年仍會是世界趨勢,中國要想辦法改善它的國際形象。中國不管做什麼都讓台灣人不高興,不買鳳梨、派戰機飛來飛去、不讓台灣加入世界衛生組織(WHO),『我都不曉得他們在幹什麼』。」並且堅持對台灣不能加入世衛表達不滿:「對醫生誓詞裡有提到不能因病患的宗教、種族等因素而影響到醫療行為,台灣不能加入WHO怎麼講都不對,其他國際組織有涉及到政治就算了,但WHO還不讓台灣參加,在國際上對中國絕對是扣分。」[106]

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