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電路板
1.
電路板 B94302344 政治三 洪瑋均 什麼是電路板? 電路板,是製造各種電子產品所需的基礎 零件,作為機械中電子零件的支撐體,將零件 集中並使各項零件之間能有電流連接,形成一 個完整的電路,方便使用。過去要連接電子元 件,必需要用電線才能完成,現在電路板取代 了以銅線配電的方式,使產品體積縮小,大量 複製成為可能,則為科技進步不可或缺的重要 角色。 電路板的製做 製做的方法有兩大方向,其一為利用化學 或機械將電路板上不要的部分去除,其二為在 電路板上增加其他物質。 下列討論幾種以化學方法為主的製法: 1.
感光電路板 設計電路圖後,用不透光的油性筆、 佈線膠帶畫在投影片上,或以電腦繪圖後 直接印出。在乾淨的電路板上塗感光劑, 以投影片覆蓋後,照射強光。未曝光的感 光劑成為銅箔的保護層,曝光後的感光劑 則會在浸泡顯影劑時被洗掉。接下來將顯 像完成後的電路板置於氯化鐵溶液中,使 不要的銅箔腐蝕掉,再用清水將蝕刻完成 的電路板清洗乾淨。最後在完成的電路板 上鑽零件孔,即告完成。 2. 絲網印刷 將設計好的電路圖做成絲網遮罩,不 需要電路的部分用不透水的物料覆蓋住, 以不會被腐蝕的保護劑塗在絲網遮罩上, 保護劑將透過絲網「畫」在空白電路板上, 當我們將電路板放到腐蝕液中,沒有保護 劑之處便會腐蝕,留下我們要的部分,最 後再清理掉保護劑,即完成電路板之製造。 3. 電鍍 先在基板上鍍一層薄銅,並覆蓋光阻 劑(D/F),經過曝光及顯影的過程,露出要 的地方,用電鍍的方式將該處的銅增厚, 再鍍一層金屬薄錫,最後除去光阻劑並把 光阻劑下的銅箔層蝕刻掉,即完成。 電路板的應用 電路板的應用非常廣泛,在消費性產品如 電玩、電視、印表機;通訊類產品如手機、網 路、數據機;資訊類產品如電腦、汽車控制系 統……等等。在這個追求輕薄短小、資訊爆炸 的年代,人們不能沒有的手機和電腦成了電路 板廣大的市場,以及追求進步旳方向。 資料來源 維基百科 http://www.lalulalu.com/viewthread.php?tid=566629 電路板的製做 http://phys.thu.edu.tw/~mengwen/note/exp01.pdf 印刷電路板 http://www.ee.kyu.edu.tw/eeworker/pro2/doc/C6408.pdf http://tech.digitimes.com.tw/ShowNews.aspx?zCatId=41 6&zNotesDocId=0000082220_B9Z1SX3L3B1YY2H1K4Y31
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