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制(Zhi)作(Zuo)PCB时(Shi)的(De)常(Chang)见(Jian)名(Ming)词(Ci)解(Jie)析(Xi)2019-04-08 20:18·EE漫(Man)谈(Tan)在(Zai)制(Zhi)作(Zuo)PCB的(De)时(Shi)候(Hou)肯(Ken)定(Ding)会(Hui)遇(Yu)到(Dao)solder Mask 和(He)paste Mask, solder Mask是(Shi)阻(Zu)焊(Han)层(Ceng),paste Mask是(Shi)焊(Han)锡(Xi)膏(Gao)层(Ceng),那(Na)么(Me)它(Ta)们(Men)实(Shi)际(Ji)指(Zhi)的(De)是(Shi)什(Shi)么(Me)含(Han)义(Yi)呢(Ne)。solder Mask (阻(Zu)焊(Han)层(Ceng))是(Shi)反(Fan)显(Xian)层(Ceng): 出(Chu)现(Xian)图(Tu)案(An)的(De)表(Biao)示(Shi)此(Ci)处(Chu)无(Wu)阻(Zu)焊(Han)层(Ceng)的(De),无(Wu)图(Tu)案(An)的(De)表(Biao)示(Shi)有(You)阻(Zu)焊(Han)层(Ceng)。solder Mask就(Jiu)是(Shi)PCB板(Ban)上(Shang)焊(Han)盘(Pan)(表(Biao)面(Mian)贴(Tie)焊(Han)盘(Pan)、插(Cha)件(Jian)焊(Han)盘(Pan)、过(Guo)孔(Kong))以(Yi)外(Wai)一(Yi)层(Ceng)涂(Tu)了(Liao)绿(Lv)油(You)的(De)地(Di)方(Fang),它(Ta)是(Shi)为(Wei)了(Liao)防(Fang)止(Zhi)在(Zai)PCB过(Guo)锡(Xi)炉(Lu)(波(Bo)峰(Feng)焊(Han))的(De)时(Shi)候(Hou),不(Bu)该(Gai)上(Shang)锡(Xi)的(De)地(Di)方(Fang)上(Shang)锡(Xi),所(Suo)以(Yi)称(Cheng)为(Wei)阻(Zu)焊(Han)层(Ceng)(绿(Lv)油(You)层(Ceng))。solder Mask又(You)可(Ke)以(Yi)分(Fen)为(Wei)Top Layers和(He)Bottom Layers两(Liang)层(Ceng),在(Zai)阻(Zu)焊(Han)层(Ceng)上(Shang)画(Hua)个(Ge)矩(Ju)形(Xing),那(Na)么(Me)这(Zhe)个(Ge)矩(Ju)形(Xing)框(Kuang)内(Nei)就(Jiu)等(Deng)于(Yu)开(Kai)了(Liao)个(Ge)窗(Chuang)口(Kou)了(Liao),就(Jiu)会(Hui)显(Xian)示(Shi)出(Chu)来(Lai)铜(Tong)皮(Pi)。solder Mask这(Zhe)个(Ge)阻(Zu)焊(Han)剂(Ji)有(You)绿(Lv)色(Se)、蓝(Lan)色(Se)、红(Hong)色(Se)、黑(Hei)色(Se)等(Deng),这(Zhe)也(Ye)是(Shi)为(Wei)什(Shi)么(Me)PCB板(Ban)子(Zi)有(You)不(Bu)同(Tong)颜(Yan)色(Se)的(De)原(Yuan)因(Yin)。同(Tong)时(Shi)需(Xu)要(Yao)主(Zhu)要(Yao)的(De)是(Shi)在(Zai)设(She)计(Ji)焊(Han)盘(Pan)时(Shi), solder Mask要(Yao)比(Bi)焊(Han)盘(Pan)大(Da)0.15mm(6mil)。Paste Mask layers(锡(Xi)膏(Gao)层(Ceng))是(Shi)正(Zheng)显(Xian)的(De),有(You)图(Tu)案(An)就(Jiu)表(Biao)明(Ming)该(Gai)处(Chu)需(Xu)要(Yao)锡(Xi)膏(Gao)。它(Ta)是(Shi)针(Zhen)对(Dui)表(Biao)面(Mian)贴(Tie)(SMD)元(Yuan)件(Jian)的(De)。Paste Mask层(Ceng)用(Yong)来(Lai)制(Zhi)作(Zuo)钢(Gang)网(Wang)﹐钢(Gang)网(Wang)上(Shang)的(De)孔(Kong)就(Jiu)对(Dui)应(Ying)着(Zhuo)电(Dian)路(Lu)板(Ban)上(Shang)的(De)SMD器(Qi)件(Jian)的(De)焊(Han)点(Dian)。在(Zai)表(Biao)面(Mian)贴(Tie)装(Zhuang)(SMD)器(Qi)件(Jian)焊(Han)接(Jie)时(Shi)﹐先(Xian)将(Jiang)钢(Gang)网(Wang)盖(Gai)在(Zai)电(Dian)路(Lu)板(Ban)上(Shang)(与(Yu)实(Shi)际(Ji)焊(Han)盘(Pan)对(Dui)应(Ying))﹐然(Ran)后(Hou)将(Jiang)锡(Xi)膏(Gao)涂(Tu)上(Shang)﹐用(Yong)刮(Gua)片(Pian)将(Jiang)多(Duo)余(Yu)的(De)锡(Xi)膏(Gao)刮(Gua)去(Qu)﹐移(Yi)除(Chu)钢(Gang)网(Wang)﹐这(Zhe)样(Yang)SMD器(Qi)件(Jian)的(De)焊(Han)盘(Pan)就(Jiu)加(Jia)上(Shang)了(Liao)锡(Xi)膏(Gao)﹐之(Zhi)后(Hou)将(Jiang)SMD器(Qi)件(Jian)贴(Tie)附(Fu)到(Dao)锡(Xi)膏(Gao)上(Shang)面(Mian)去(Qu)(手(Shou)工(Gong)或(Huo)贴(Tie)片(Pian)机(Ji))﹐最(Zui)后(Hou)通(Tong)过(Guo)回(Hui)流(Liu)焊(Han)机(Ji)完(Wan)成(Cheng)SMD器(Qi)件(Jian)的(De)焊(Han)接(Jie)。通(Tong)常(Chang)钢(Gang)网(Wang)上(Shang)孔(Kong)径(Jing)的(De)大(Da)小(Xiao)会(Hui)比(Bi)电(Dian)路(Lu)板(Ban)上(Shang)实(Shi)际(Ji)的(De)焊(Han)小(Xiao)一(Yi)些(Xie)。对(Dui)于(Yu)不(Bu)同(Tong)焊(Han)盘(Pan)的(De)不(Bu)同(Tong)要(Yao)求(Qiu)﹐也(Ye)可(Ke)以(Yi)在(Zai)Paste Mask层(Ceng)中(Zhong)设(She)定(Ding)多(Duo)重(Zhong)规(Gui)则(Ze),Paste Mask也(Ye)有(You)2层(Ceng)﹐分(Fen)别(Bie)是(Shi)Top Paste和(He)Bottom Paste。在(Zai)Paste Mask layers上(Shang)画(Hua)个(Ge)矩(Ju)形(Xing),那(Na)么(Me)这(Zhe)个(Ge)矩(Ju)形(Xing)框(Kuang)内(Nei)就(Jiu)等(Deng)于(Yu)开(Kai)了(Liao)个(Ge)窗(Chuang)口(Kou)了(Liao),机(Ji)器(Qi)就(Jiu)此(Ci)窗(Chuang)口(Kou)内(Nei)喷(Pen)上(Shang)焊(Han)锡(Xi)了(Liao)(其(Qi)实(Shi)是(Shi)钢(Gang)网(Wang)开(Kai)了(Liao)个(Ge)窗(Chuang),过(Guo)波(Bo)峰(Feng)焊(Han)就(Jiu)上(Shang)锡(Xi)了(Liao))。同(Tong)时(Shi) Keepout 和(He)Mechanical layer也(Ye)很(Hen)容(Rong)易(Yi)弄(Nong)混(Hun)。Keepout指(Zhi)的(De)是(Shi)边(Bian)界(Jie),用(Yong)来(Lai)确(Que)定(Ding)各(Ge)种(Zhong)电(Dian)气(Qi)边(Bian)界(Jie)。Mechanical layer,真(Zhen)正(Zheng)的(De)物(Wu)理(Li)边(Bian)界(Jie)。定(Ding)位(Wei)孔(Kong)的(De)就(Jiu)按(An)照(Zhao)Mechanical layer的(De)尺(Chi)寸(Cun)来(Lai)做(Zuo)的(De)。在(Zai)PCB中(Zhong)经(Jing)常(Chang)会(Hui)遇(Yu)到(Dao)装(Zhuang)配(Pei)层(Ceng)Assembly和(He)印(Yin)丝(Si)层(Ceng)Silkscreen。那(Na)么(Me)这(Zhe)两(Liang)层(Ceng)又(You)是(Shi)什(Shi)么(Me)含(Han)义(Yi)呢(Ne)?Silkscreen,丝(Si)印(Yin)层(Ceng)。指(Zhi)的(De)是(Shi)元(Yuan)器(Qi)件(Jian)的(De)外(Wai)形(Xing)平(Ping)面(Mian)图(Tu),代(Dai)表(Biao)器(Qi)件(Jian)外(Wai)廓(Kuo)的(De)图(Tu)形(Xing)符(Fu)号(Hao)。PCB设(She)计(Ji)时(Shi),出(Chu)光(Guang)绘(Hui)数(Shu)据(Ju)时(Shi)常(Chang)使(Shi)用(Yong)此(Ci)层(Ceng)数(Shu)据(Ju)。更(Geng)贴(Tie)切(Qie)的(De)说(Shuo)就(Jiu)是(Shi)Silkscreen lay 会(Hui)印(Yin)在(Zai)PCB板(Ban)子(Zi)上(Shang)。装(Zhuang)配(Pei)层(Ceng)Assembly lay:PLACE BOUND TOP /BOTTOM ,即(Ji)物(Wu)理(Li)外(Wai)形(Xing)图(Tu)形(Xing)。可(Ke)以(Yi)用(Yong)于(Yu)DFA规(Gui)则(Ze):DFM/DFA,是(Shi)DESIGN FOR 制(Zhi)造(Zao)(M)/DESIGN FOR装(Zhuang)配(Pei)(A)。装(Zhuang)配(Pei)层(Ceng)用(Yong)于(Yu)布(Bu)局(Ju)和(He)出(Chu)装(Zhuang)配(Pei)图(Tu)时(Shi)用(Yong)。是(Shi)当(Dang)可(Ke)以(Yi)提(Ti)供(Gong)给(Gei)CHECK人(Ren)员(Yuan)检(Jian)查(Cha)元(Yuan)器(Qi)件(Jian)摆(Bai)放(Fang)是(Shi)否(Fou)有(You)问(Wen)题(Ti),是(Shi)否(Fou)满(Man)足(Zu)可(Ke)制(Zhi)造(Zao)型(Xing)需(Xu)求(Qiu)。在(Zai)PCB中(Zhong)还(Huan)经(Jing)常(Chang)遇(Yu)到(Dao)正(Zheng)片(Pian)和(He)负(Fu)片(Pian)这(Zhe)两(Liang)个(Ge)词(Ci),正(Zheng)片(Pian)和(He)负(Fu)片(Pian)只(Zhi)是(Shi)指(Zhi)一(Yi)个(Ge)层(Ceng)的(De)两(Liang)种(Zhong)不(Bu)同(Tong)的(De)显(Xian)示(Shi)效(Xiao)果(Guo)。无(Wu)论(Lun)这(Zhe)一(Yi)层(Ceng)是(Shi)设(She)置(Zhi)正(Zheng)片(Pian)还(Huan)是(Shi)负(Fu)片(Pian),作(Zuo)出(Chu)来(Lai)的(De)PCB板(Ban)是(Shi)一(Yi)样(Yang)的(De)。只(Zhi)是(Shi)在(Zai)cadence处(Chu)理(Li)的(De)过(Guo)程(Cheng)中(Zhong),数(Shu)据(Ju)量(Liang),DRC检(Jian)测(Ce),以(Yi)及(Ji)软(Ruan)件(Jian)的(De)处(Chu)理(Li)过(Guo)程(Cheng)不(Bu)同(Tong)而(Er)已(Yi)。只(Zhi)是(Shi)一(Yi)个(Ge)事(Shi)物(Wu)的(De)两(Liang)种(Zhong)表(Biao)达(Da)方(Fang)式(Shi)。正(Zheng)片(Pian)就(Jiu)是(Shi),你(Ni)看(Kan)到(Dao)什(Shi)么(Me),就(Jiu)是(Shi)什(Shi)么(Me),你(Ni)看(Kan)到(Dao)布(Bu)线(Xian)就(Jiu)是(Shi)布(Bu)线(Xian),是(Shi)真(Zhen)是(Shi)存(Cun)在(Zai)的(De)。负(Fu)片(Pian)就(Jiu)是(Shi),你(Ni)看(Kan)到(Dao)什(Shi)么(Me),就(Jiu)没(Mei)有(You)什(Shi)么(Me),你(Ni)看(Kan)到(Dao)的(De),恰(Qia)恰(Qia)是(Shi)需(Xu)要(Yao)腐(Fu)蚀(Shi)掉(Diao)的(De)铜(Tong)皮(Pi)。正(Zheng)片(Pian)的(De)优(You)点(Dian)是(Shi)如(Ru)果(Guo)移(Yi)动(Dong)元(Yuan)件(Jian)或(Huo)者(Zhe)过(Guo)孔(Kong)需(Xu)要(Yao)重(Zhong)新(Xin)铺(Pu)铜(Tong),有(You)较(Jiao)全(Quan)面(Mian)的(De)DRC校(Xiao)验(Yan)。负(Fu)片(Pian)的(De)优(You)点(Dian)是(Shi)移(Yi)动(Dong)元(Yuan)件(Jian)或(Huo)者(Zhe)过(Guo)孔(Kong)不(Bu)需(Xu)重(Zhong)新(Xin)铺(Pu)铜(Tong),自(Zi)动(Dong)更(Geng)新(Xin)铺(Pu)铜(Tong),没(Mei)有(You)全(Quan)面(Mian)的(De)DRC校(Xiao)验(Yan)。PCB制(Zhi)造(Zao)过(Guo)程(Cheng)中(Zhong)的(De)名(Ming)词(Ci)很(Hen)多(Duo),也(Ye)比(Bi)较(Jiao)容(Rong)易(Yi)弄(Nong)混(Hun),通(Tong)过(Guo)本(Ben)次(Ci)的(De)学(Xue)习(Xi),你(Ni)弄(Nong)清(Qing)楚(Chu)了(Liao)吗(Ma)?
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段玉心居然冷冷地笑了笑缓缓地说了一句