Zininzi iingqalelo zomgama wokhuseleko kwi Uyilo PCB, ukuquka isithuba phakathi kokulandelelwa, izithuba zabalinganiswa, izithuba zepadi, nokunye. Apha, sizihlela zibe ziindidi ezimbini: imigama yokhuseleko enxulumene nombane kunye nemigama yokhuseleko engahambelani nombane.
01 Imida yoKhuseleko oluNxulumene noMbane
Treyisa-ukuya-Trace izithuba
Ngobuchule bokuqhuba abavelisi bePCB abaqhelekileyo, umgama omncinci phakathi kweetreyisi akufanele ube ngaphantsi kwe-0.075mm. Ubuncinane besithuba somkhondo sibhekiselele kowona mgama umncinci phakathi komkhondo kunye nomnye umkhondo okanye phakathi komkhondo kunye nephedi. Ukusuka kwimbono yokuvelisa, isithuba esikhulu somkhondo singcono. Ixabiso eliqhelekileyo li-0.127mm.
I-Pad Hole Diameter kunye nobubanzi bePad
Kubavelisi bePCB abaqhelekileyo, ukuba iphedi isebenzisa ukomba ngoomatshini, ubuncinci bomngxuma wedayamitha akufunekanga bube ngaphantsi kwe-0.2mm. Ukuba i-laser drilling isetyenzisiwe, ubuncinane bomngxuma we-diameter akufanele ube ngaphantsi kwe-0.1mm. Ukunyamezelana kwedayamitha yomngxuma kunokwahluka kancinane ngokuxhomekeke kwizinto eziphathekayo, kodwa kulawulwa ngokubanzi ngaphakathi kwe-0.05mm. Ubuncinci bephedi ububanzi akufunekanga bube ngaphantsi kwe-0.2mm.
Isithuba sePad-to-Pad
Kubenzi bePCB abaqhelekileyo, umgama omncinci phakathi kweepads akufanele ube ngaphantsi kwe-0.2mm.
iSithuba soCopper-to-Edge
Umgama omncinci phakathi kobhedu oluphilayo kunye nomphetho we-PCB kufuneka ungabi ngaphantsi kwe-0.3mm. Oku kunokusetwa kwiMithetho yoYilo> Ulwandlalo lwebhodi iphepha.
Ukuthulula ubhedu kwindawo enkulu, kuqhelekile ukunciphisa indawo yobhedu ngaphakathi ukusuka kumda webhodi, ngokuqhelekileyo ibekwe kwi-0.2mm. Kuyilo lwePCB kunye neshishini lokuvelisa, ukuthintela imiba enokubakho efana nokuvezwa kobhedu kumda webhodi obangela i-warping okanye iibhulukhwe ezimfutshane zombane, iinjineli zihlala zinciphisa indawo yobhedu ngaphakathi nge-8 mils kunokuyandisa yonke indlela ukuya emphethweni.
Zininzi iindlela zokuphumeza oku kobhedu, njengokuzoba umaleko wokugcina kumda webhodi nokubeka umgama phakathi kokugalela ubhedu kunye nendawo yokugcina ngaphandle. Indlela elula kukuseta imigama eyohlukeneyo yokhuseleko kwizinto zobhedu, njengokuseta umgama wokhuseleko webhodi iyonke ukuya kwi-0.25mm kunye nomgama wokugalela ubhedu ukuya kwi-0.5mm, okuya kubangela i-0.5mm ye-offset ukusuka kumda webhodi ngelixa ususa iindawo ezinobhedu ezifileyo kumacandelo.
02 Imigama yoKhuseleko olungaManyani noMbane
Ububanzi bomlinganiswa, umphakamo, kunye neSithuba
Kwimeko yokusetyenzwa kwesikrini sesilika, akukho lulungiso kufuneka lwenziwe kwifonti. Nawaphi na amagama anobubanzi bomgca (D-CODE) ngaphantsi kwe-0.22mm (8.66 mils) kufuneka imigca yawo ijiye ibe yi-0.22mm. Ububanzi bonobumba xa bubonke (W) kufuneka bube yi-1.0mm, kwaye ubude bonobumba (H) bube yi-1.2mm. Isithuba phakathi koonobumba (D) kufuneka ubuncinane sibe yi-0.2mm. Ukuba iimpawu zincinci kunezi nkcukacha, ziya kubonakala bluzizi xa zishicilelwe.
I-Via-to-Via Spacing
Isithuba phakathi kwe-vias (idlula-ukuya, embindini ukuya embindini) kufuneka ibe yi-8 mil ubuncinane.
Silkscreen ukuya Pad Spacing
I-silkscreen akufanele idibanise iipads. Ukuba i-silkscreen igubungela i-pad, iya kuthintela i-pad ukuba ingathengiswa ngokufanelekileyo ngexesha lenkqubo yokuhlanganisa. Ukukhutshwa okucetyiswayo ubuncinane kwi-8 mils. Ukuba indawo ye-PCB ilinganiselwe, imvume ye-4 mil inokwamkeleka, kodwa oku kufuneka kuphetshwe ukuba kunokwenzeka. Ukuba i-silkscreen igqithise ngokungaziyo ipad ngexesha loyilo, umenzi uya kudla ngokususa i-silkscreen kwindawo ye-pad ukuqinisekisa ukuthengiswa okufanelekileyo.
Kwezinye iimeko, abaqulunqi banokubeka ngabom isikrini sesilika kufutshane neepads, ngakumbi xa iipadi ezimbini zisondelelene kakhulu. Kwiimeko ezinjalo, i-silkscreen inokuthintela ngempumelelo imijikelezo emfutshane phakathi kweepads ze-soldering, kodwa oku kufuneka kuthathelwe ingqalelo kwimeko-nge-case.
Mechanical 3D Ubude kunye neSithuba esithe tye
Xa ubeka amacandelo kwi-PCB, kubalulekile ukuqwalasela ukuba ayangqubana nezinye izakhiwo zoomatshini ngokobude kunye nesithuba esithe tye. Ngexesha lesigaba soyilo, kubalulekile ukuqinisekisa ukuba kukho isithuba esaneleyo phakathi kwezinto, iPCB kunye neqokobhe langaphandle lemveliso, kunye nezinye izinto zolwakhiwo ukunqanda ungquzulwano ngokwasemzimbeni. Kufuneka kubonelelwe ngokucokisekileyo ngokufanelekileyo ukuqinisekisa ukuba akukho luphazamiso lwenzekayo.
La maxabiso angasentla ngawereferensi kwaye anokunika isikhokelo xa uchaza imida yokhuseleko kuyilo lwakho, kodwa akameli imigangatho yoshishino engqongqo. Iimfuno ezithile zinokwahluka ngokuxhomekeke kumvelisi wePCB okanye imiqobo yoyilo lwemveliso.
