博(Bo)运(Yun)发(Fa)---欢(Huan)迎(Ying)客(Ke)户(Hu)朋(Peng)友(You)来(Lai)我(Wo)司(Si)工(Gong)厂(Chang)考(Kao)察(Cha)指(Zhi)导(Dao)!(?)
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工(Gong)业(Ye)级(Ji)电(Dian)路(Lu)板(Ban)核(He)心(Xin)厂(Chang)家(Jia)
一(Yi)站(Zhan)式(Shi)PCBA制(Zhi)造(Zao)服(Fu)务(Wu)专(Zhuan)家(Jia)
发(Fa)布(Bu)时(Shi)间(Jian):(?)2017-12-14
PCB使(Shi)用(Yong)树(Shu)脂(Zhi)塞(Sai)孔(Kong)这(Zhe)制(Zhi)程(Cheng)常(Chang)是(Shi)因(Yin)为(Wei)BGA零(Ling)件(Jian),(?)因(Yin)为(Wei)传(Chuan)统(Tong)BGA可(Ke)能(Neng)会(Hui)在(Zai)PAD与(Yu)PAD间(Jian)做(Zuo)VIA到(Dao)背(Bei)面(Mian)去(Qu)走(Zou)线(Xian),(?)但(Dan)是(Shi)若(Ruo)BGA过(Guo)密(Mi)导(Dao)致(Zhi)VIA
走(Zou)不(Bu)出(Chu)去(Qu)时(Shi),(?)就(Jiu)可(Ke)以(Yi)直(Zhi)接(Jie)从(Cong)PAD钻(Zuan)孔(Kong)做(Zuo)via到(Dao)别(Bie)层(Ceng)去(Qu)走(Zou)线(Xian),(?)再(Zai)将(Jiang)孔(Kong)用(Yong)树(Shu)脂(Zhi)填(Tian)平(Ping)镀(Du)铜(Tong)变(Bian)成(Cheng)PAD,(?)也(Ye)就(Jiu)是(Shi)俗(Su)称(Cheng)的(De)VIP制(Zhi)程(Cheng)(via in pad),(?)
若(Ruo)只(Zhi)是(Shi)在(Zai)PAD上(Shang)做(Zuo)via而(?)没(Mei)有(You)用(Yong)树(Shu)脂(Zhi)塞(Sai)孔(Kong),(?)就(Jiu)容(Rong)易(Yi)造(Zao)成(Cheng)漏(Lou)锡(Xi)导(Dao)致(Zhi)背(Bei)面(Mian)短(Duan)路(Lu)以(Yi)及(Ji)正(Zheng)面(Mian)的(De)空(Kong)焊(Han)。(?)
PCB树(Shu)脂(Zhi)塞(Sai)孔(Kong)的(De)制(Zhi)程(Cheng)包(Bao)括(Kuo)钻(Zuan)孔(Kong)、(?)电(Dian)镀(Du)、(?)塞(Sai)孔(Kong)、(?)烘(Hong)烤(Kao)、(?)研(Yan)磨(Mo),(?)钻(Zuan)孔(Kong)后(Hou)将(Jiang)孔(Kong)镀(Du)通(Tong),(?)接(Jie)着(Zhuo)再(Zai)塞(Sai)树(Shu)脂(Zhi)烘(Hong)烤(Kao),(?)最(Zui)后(Hou)就(Jiu)是(Shi)研(Yan)磨(Mo)将(Jiang)之(Zhi)磨(Mo)平(Ping),(?)磨(Mo)
平(Ping)后(Hou)的(De)树(Shu)脂(Zhi)因(Yin)为(Wei)不(Bu)含(Han)铜(Tong),(?)所(Suo)以(Yi)还(Huan)要(Yao)再(Zai)度(Du)一(Yi)层(Ceng)铜(Tong)上(Shang)去(Qu)将(Jiang)它(Ta)变(Bian)成(Cheng)PAD,(?)这(Zhe)些(Xie)制(Zhi)程(Cheng)都(Du)是(Shi)在(Zai)原(Yuan)本(Ben)PCB钻(Zuan)孔(Kong)制(Zhi)程(Cheng)前(Qian)做(Zuo)的(De),(?)也(Ye)就(Jiu)是(Shi)先(Xian)将(Jiang)要(Yao)塞(Sai)孔(Kong)
的(De)孔(Kong)处(Chu)理(Li)好(Hao),(?)然(Ran)后(Hou)再(Zai)钻(Zuan)其(Qi)他(Ta)孔(Kong),(?)照(Zhao)原(Yuan)本(Ben)正(Zheng)常(Chang)的(De)制(Zhi)程(Cheng)走(Zou)。(?)
塞(Sai)孔(Kong)若(Ruo)没(Mei)有(You)塞(Sai)好(Hao),(?)孔(Kong)内(Nei)有(You)气(Qi)泡(Pao)时(Shi),(?)因(Yin)为(Wei)气(Qi)泡(Pao)容(Rong)易(Yi)吸(Xi)湿(Shi),(?)板(Ban)子(Zi)再(Zai)过(Guo)锡(Xi)炉(Lu)时(Shi)就(Jiu)可(Ke)能(Neng)会(Hui)爆(Bao)板(Ban),(?)不(Bu)过(Guo)塞(Sai)孔(Kong)的(De)过(Guo)程(Cheng)中(Zhong)若(Ruo)孔(Kong)内(Nei)有(You)气(Qi)泡(Pao),(?)烘(Hong)烤(Kao)
时(Shi)气(Qi)泡(Pao)就(Jiu)会(Hui)将(Jiang)树(Shu)脂(Zhi)挤(Ji)出(Chu),(?)造(Zao)成(Cheng)一(Yi)边(Bian)凹(Ao)陷(Xian)一(Yi)边(Bian)突(Tu)出(Chu)的(De)情(Qing)况(Kuang),(?)此(Ci)时(Shi)可(Ke)以(Yi)将(Jiang)不(Bu)良(Liang)品(Pin)检(Jian)出(Chu),(?)而(?)有(You)气(Qi)泡(Pao)的(De)板(Ban)子(Zi)也(Ye)不(Bu)见(Jian)得(De)会(Hui)爆(Bao)板(Ban),(?)因(Yin)为(Wei)爆(Bao)板(Ban)
的(De)主(Zhu)因(Yin)是(Shi)湿(Shi)气(Qi),(?)所(Suo)以(Yi)若(Ruo)是(Shi)刚(Gang)出(Chu)厂(Chang)的(De)板(Ban)子(Zi)或(Huo)板(Ban)子(Zi)在(Zai)上(Shang)件(Jian)时(Shi)有(You)经(Jing)过(Guo)烘(Hong)烤(Kao),(?)一(Yi)般(Ban)而(?)言(Yan)也(Ye)不(Bu)会(Hui)造(Zao)成(Cheng)爆(Bao)板(Ban)。(?)
上(Shang)一(Yi)条(Tiao):(?) 什(Shi)么(Me)是(Shi)盘(Pan)中(Zhong)孔(Kong)?(?)盘(Pan)中(Zhong)孔(Kong)塞(Sai)孔(Kong)工(Gong)艺(Yi)该(Gai)如(Ru)何(He)控(Kong)制(Zhi)?(?)
下(Xia)一(Yi)条(Tiao):(?) 什(Shi)么(Me)是(Shi)盲(Mang)孔(Kong)?(?)什(Shi)么(Me)是(Shi)埋(Mai)孔(Kong)?(?)
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