PCB新聞 - 兩種印刷電路板工藝-（負極和正極）

印刷電路板負片：通常我們談論拉帳篷的過程. 所用的化學溶液是酸蝕負膜，因為在製備薄膜後, 所需的電路或銅表面是透明的, 不需要的部分是黑色的. 過程暴露後, 透明部分通過暴露在光下的幹膜抗蝕劑進行化學固化. 隨後的顯影過程將沖洗掉未固化的幹膜, 所以在蝕刻過程中, 只有被沖走的幹膜部分將被蝕刻. Copper foil (the black part of the negative), 保持幹膜未清洗, belongs to the circuit we want (the transparent part of the negative)

印刷電路板 正面電影：我們通常談論圖案製作過程. 使用的化學溶液是鹼性蝕刻正片. 如果從底片上看, 所需電路或銅表面為黑色, 另一部分是透明的. 暴露電路過程後也會發生同樣的情况, 由於幹膜抗蝕劑暴露在光下，透明部分被化學硬化. 下一個顯影過程將洗掉未硬化的幹膜, 然後是錫鉛電鍍工藝, and the tin-lead is plated in the front One process (development) on the copper surface washed away by the dry film, and then remove the film (remove the dry film hardened by light), 在接下來的蝕刻過程中, use alkaline solution to bite off the copper that is not protected by tin and lead Foil (the transparent part of the negative), the rest is the circuit we want (the black part of the negative)

Positive film and negative film are actually selected according to the process of each company. Positive film: the process is (雙面) cutting-drilling-PTH (one-time plating is also called thick copper)-circuit-two copper (pattern plating) and then SES Line (removal film-etching-removal tin) negative film: the process is (雙面) cutting-drilling-PTH (one-time plating is also called thick copper)-line (not through two copper pattern plating) and then take the DES line (etching -Remove film)

1. Distinguish the master film (negative film), 工作膠片, 正片和負片, and film surface: film has master film and working film (child film), 黑膜和黃膜, 正片和負片； 2 一般來說, 黑色電影的母片, 也稱為銀鹽膜, it is mainly used to copy work film (yellow film is also called diazo film), 但工作電影不一定只是黃色電影. 工作底片也有黑色底片, 主要用於高精度HDI. 為了省錢, 可用於一次性小批量生產 電路板. 黃色薄膜用於製造普通板材和批量普通板材 電路板. 3. 區分藥膜表面時, 黑色光滑的表面是藥用薄膜, 而黃色膠片則相反. 通常地, 用刮刀或刮刀刮藥膜，你可以看到藥膜的哪一面. (Master film: orthographic positive medicine surface, sub-film: orthographic negative medicine surface) 4. 注意黃色片劑的使用：有兩種類型的光滑和啞光表面. 這兩種類型的潤滑油容易在油表面產生壓痕. 5. The light-transmitting negative film on the film circuit (with copper), 不透明膜為正膜； 正極膜用於圖案電鍍, 該電路已研製成功, 剩下的功能是防腐電鍍, 主要鍍有鉛和錫 . 負片用於直接蝕刻, 顯影後留下的抗蝕劑是一個電路, 直接用酸性蝕刻溶液蝕刻.

以上介紹了正反兩方面的區別 印刷電路板電路板. Ipcb還提供 印刷電路板製造商 and 印刷電路板製造 technology.