一、銅箔是什么東西
銅箔是(shi)一(yi)種陰質性電解材料,沉淀于電路(lu)板基底層上的一(yi)層薄的、連續的金(jin)屬(shu)箔,它(ta)作為PCB的導電體(ti)。它(ta)容易粘合于絕緣(yuan)層,接受印(yin)刷保護(hu)層,腐蝕(shi)后形成(cheng)電路(lu)圖樣(yang)。
銅(tong)(tong)箔(bo)由銅(tong)(tong)加一(yi)定比例的(de)其(qi)它金屬(shu)打(da)制而成,銅(tong)(tong)箔(bo)一(yi)般有(you)90箔(bo)和88箔(bo)兩(liang)種,即為含(han)銅(tong)(tong)量為90%和88%,尺寸(cun)為16*16cm銅(tong)(tong)箔(bo),是(shi)用(yong)途最廣泛的(de)裝(zhuang)飾材料。如(ru):賓館酒(jiu)店、寺院佛像(xiang)、金字招(zhao)牌、瓷磚馬賽克(ke)、工藝品等。
二、銅箔的特性
銅(tong)箔(bo)(bo)(bo)具(ju)有(you)(you)低表(biao)面(mian)氧氣(qi)特性,可以附著(zhu)與各種(zhong)不同(tong)基材,如金屬,絕緣材料(liao)等(deng),擁有(you)(you)較寬的(de)溫(wen)度使用范圍。主要應用于電(dian)(dian)磁(ci)屏蔽(bi)及抗靜電(dian)(dian),將導(dao)電(dian)(dian)銅(tong)箔(bo)(bo)(bo)置于襯底面(mian),結合金屬基材,具(ju)有(you)(you)優(you)良的(de)導(dao)通性,并提供電(dian)(dian)磁(ci)屏蔽(bi)的(de)效果。可分為(wei):自粘銅(tong)箔(bo)(bo)(bo)、雙導(dao)銅(tong)箔(bo)(bo)(bo)、單導(dao)銅(tong)箔(bo)(bo)(bo)等(deng)。
三、銅箔生產工藝流程
銅箔根據生(sheng)(sheng)產方式的不同分為(wei)(wei):電(dian)解銅(tong)(tong)(tong)(tong)(tong)箔(bo)(bo)(bo)和壓延銅(tong)(tong)(tong)(tong)(tong)箔(bo)(bo)(bo)。電(dian)解銅(tong)(tong)(tong)(tong)(tong)箔(bo)(bo)(bo)是利(li)(li)用(yong)電(dian)化學原理(li)通過銅(tong)(tong)(tong)(tong)(tong)電(dian)解而制成的,制成生(sheng)(sheng)箔(bo)(bo)(bo)的內部組織(zhi)結(jie)構(gou)為(wei)(wei)垂直針(zhen)狀(zhuang)(zhuang)結(jie)晶(jing)構(gou)造,其生(sheng)(sheng)產成本相對(dui)較低。壓延銅(tong)(tong)(tong)(tong)(tong)箔(bo)(bo)(bo)是利(li)(li)用(yong)塑(su)性加(jia)工原理(li),通過對(dui)銅(tong)(tong)(tong)(tong)(tong)錠的反(fan)復軋(ya)制-退火(huo)工藝而成的,其內部組織(zhi)結(jie)構(gou)為(wei)(wei)片狀(zhuang)(zhuang)結(jie)晶(jing)組織(zhi),壓延銅(tong)(tong)(tong)(tong)(tong)箔(bo)(bo)(bo)產品的延展性較好。現階段,在剛性電(dian)路(lu)板(ban)的生(sheng)(sheng)產中主要采(cai)用(yong)電(dian)解銅(tong)(tong)(tong)(tong)(tong)箔(bo)(bo)(bo),而壓延銅(tong)(tong)(tong)(tong)(tong)箔(bo)(bo)(bo)主要用(yong)于(yu)撓性和高頻電(dian)路(lu)板(ban)中。
1、電解銅箔的工藝流程
電(dian)解銅箔生(sheng)產工序(xu)簡(jian)單,主要工序(xu)有三道(dao):溶液生(sheng)箔、表面處理和產品分切。其生(sheng)產過(guo)程(cheng)看(kan)似簡(jian)單,卻是集電(dian)子、機械、電(dian)化學為一體,并且是對(dui)生(sheng)產環境要求特別(bie)嚴格的一個生(sheng)產過(guo)程(cheng)。所以,電(dian)解銅箔行業并沒有一套標準通用(yong)的生(sheng)產設備和技術,各(ge)生(sheng)產商各(ge)顯神通,這也是影響(xiang)國(guo)內電(dian)解銅箔產能及品質提升的一個重(zhong)要瓶頸。
2、壓延銅箔的工藝流程