Yeyiphi imigaqo emithandathu yocingo lwePCB?

I-Zhejiang NeoDen Technology Co., LTD., yasekwa ngo-2010, ngumvelisi oyingcali okhethekileyoUmatshini wokuxhoma we-SMT, reflow oven,umshicileli westencil, Umgca wokuvelisa we-SMT kunye nezinye iiMveliso ze-SMT.Sineqela lethu le-R & D kunye nemizi-mveliso yethu, sithatha ithuba le-R&D yethu etyebileyo, imveliso eqeqeshwe kakuhle, yaphumelela igama elihle kubathengi behlabathi ngokubanzi.
Kule minyaka ilishumi, siye saphuhlisa ngokuzimeleyoNeoDen4, NeoDen IN6,NeoDen K1830, NeoDen FP2636 kunye nezinye iimveliso ze-SMT, ezithengiswe kakuhle kwihlabathi jikelele.Ukuza kuthi ga ngoku, sithengise ngaphezulu koomatshini be-10,000pcs kwaye sabathumela kumazwe angaphezu kwe-130 kwihlabathi liphela, siseka igama elihle kwimarike.Kwi-Ecosystem yethu yehlabathi, sisebenzisana nelona qabane lethu libalaseleyo ukuhambisa inkonzo evalayo yokuthengisa, inkxaso ephezulu yobuchwephesha kunye neyobuchule.
Yeyiphi imigaqo emithandathu yocingo lwePCB?
1. Ukunikezelwa kwamandla, ukulungiswa komhlaba
Zombini i-wiring kwibhodi yonke ye-PCB igqitywe kakuhle, kodwa ukuphazamiseka okubangelwa amandla angaqwalaselwanga kakuhle kunye nemigca yomhlaba kuya kuthoba ukusebenza kwemveliso, kwaye ngamanye amaxesha kuchaphazela impumelelo yemveliso.Ngoko ke, i-wiring yombane kunye nemigca yomhlaba kufuneka ithathwe ngokungathí sina ukunciphisa ukuphazamiseka kwengxolo eyenziwa ngumbane kunye nemigca yomhlaba ukuqinisekisa umgangatho weemveliso.Kwinjineli nganye ebandakanyeka kuyilo lweemveliso zombane ziqonde izizathu zengxolo eyenziwe phakathi komhlaba kunye neentambo zombane.Ngoku kuphela ukunciphisa uhlobo lokunciphisa ingxolo yokuvakalisa: owaziwayo kumandla ombane, phakathi komgca womhlaba kunye ne-decoupling capacitors.Zama ukwandisa unikezelo lwamandla, ububanzi bomgca womhlaba, ngokukhethekayo banzi kunomgca wamandla, ubudlelwane babo bu: umgca ophantsi > umgca wamandla > umgca wesignali, ngokuqhelekileyo ububanzi bomgca wesignali: 0.2 ~ 0.3mm, ubukhulu becala ububanzi obucokisekileyo ukuya kwi-0.05 ~ 0.07mm, intambo yombane ye-1.2 ~ 2.5 mm kwisekethe yedijithali PCB ekhoyo ngocingo olubanzi lomhlaba ukwenza isekethe, oko kukuthi, ukwenza uthungelwano lomhlaba oluza kusetyenziswa (isekethe ye-analog ye (umhlaba wesekethe ye-analog ayinakusetyenziswa ngolu hlobo) ngommandla omkhulu umaleko ubhedu emhlabeni, kwibhodi yesekethe eprintiweyo ayisetyenziswa kwindawo ziqhagamshelwe emhlabeni njengoko emhlabeni Okanye wenze ibhodi multilayer, unikezelo lwamandla, umhlaba ngamnye athathe umaleko.
2. Iisekethe zedijithali kunye neesekethe ze-analog zokulungiswa komhlaba oqhelekileyo
Kule mihla, ii-PCB ezininzi aziseyiyo isekethe enomsebenzi omnye, kodwa zingumxube weesekethe zedijithali kunye ne-analog.Ngoko ke, kwi-wiring kuya kufuneka kuqwalaselwe ingxaki yokuphazamiseka okufanayo phakathi kwabo, ngokukodwa ukuphazamiseka kwengxolo phantsi.Iisekethe zeDijithali zizijikelezo eziphakamileyo, iisekethe ze-analog zinovakalelo, kwimigca yophawu, imigca yophawu oluphezulu-frequency kude kangangoko kunokwenzeka ukusuka kwizixhobo zesekethe ye-analog, emhlabeni, iPCB yonke kwihlabathi langaphandle kuphela isiphambuka, ngoko ke iPCB kufuneka ibe kusetyenzwa ngaphakathi kwedijithali kunye analog kumhlaba eqhelekileyo, kwaye ibhodi okunene yahlulwe kumhlaba yedijithali kunye analog abadityaniswanga omnye komnye, kuphela PCB kunye noqhagamshelwano lwehlabathi ngaphandle Ujongano phakathi PCB kunye nehlabathi langaphandle.Umhlaba wedijithali kunye nomhlaba we-analog unonxibelelwano olufutshane, nceda uqaphele ukuba kukho indawo enye yokudibanisa.Kwakhona akukho mhlaba uqhelekileyo kwi-PCB, emiselwa yinkqubo yoyilo.
3. imigca yemiqondiso ebekwe phezu kombane (umhlaba) umaleko
Kwi-multilayer eprintiweyo ibhodi yesekethe wiring, ngenxa yomgca umqondiso umaleko ayigqitywanga ilaphu ilayini ekhohlo akananto ingako, kwaye ke ukongeza umaleko ngaphezulu kuya kubangela inkunkuma nayo iya kongeza isixa esithile somsebenzi kwimveliso, ixabiso liye landa ngokufanelekileyo, ukwenzela ukusombulula oku kuphikisana, unokuqwalasela i-wiring kumbane (umhlaba) umaleko.Ingqwalasela yokuqala kufuneka ibe kukusebenzisa umaleko wamandla, kulandele umaleko womhlaba.Ngenxa yokuba kungcono ukugcina ingqibelelo yomgangatho womhlaba.
4. Ukuphathwa kwemilenze yokudibanisa kwii-conductor zendawo enkulu
Kumhlaba omkhulu (umbane), amacandelo asetyenziswa ngokuqhelekileyo emlenzeni kunye nokudibanisa kwawo, ukuqhutyelwa komlenze wokudibanisa kufuna ukuqwalaselwa ngokubanzi, ngokubhekiselele ekusebenzeni kombane, i-pad yecandelo lomlenze kunye nobhedu uxhulumaniso olupheleleyo lulungile, kodwa ukudityaniswa kwewelding yamacandelo kukho imigibe enganqwenelekiyo enje: ① ukuwelda kufuna izifudumezi ezinamandla aphezulu.② lula ukubangela amanqaku e-solder yobuxoki.Ngoko ke uthathele ingqalelo ukusebenza kombane kunye neemfuno inkqubo, ezenziwe pads intyatyambo cross, ebizwa ngokuba yedwa thermal eyaziwa ngokuba pads ashushu, ukuze amathuba okuba amanqaku solder lobuxoki ngenxa yokuchitha ubushushu ngokugqithiseleyo kwi-cross-icandelo ngexesha welding kuncitshiswe kakhulu.Ibhodi ye-Multi-layer ye-grounding (umhlaba) umlenze womlenze wonyango olufanayo.
5. Indima yeenkqubo zenethiwekhi kwi-wiring
Kwiinkqubo ezininzi zeCAD, i-wiring isekelwe kwisigqibo senkqubo yenethiwekhi.Igridi ixinene kakhulu, indlela inyukile, kodwa inyathelo lincinci kakhulu, kwaye inani ledatha kwibala lomzobo likhulu kakhulu, eliqinisekileyo elineemfuno eziphezulu zendawo yokugcina izixhobo, kwaye nayo inefuthe elikhulu. kwisantya sekhompyuter yeemveliso zombane zohlobo lwekhompyuter.Kwaye ezinye zendlela ayisebenzi, ezifana pad ehlala umlenze wecandelo okanye ngomngxuma wofakelo, igxininise imingxunya yabo ehlala yi.Igridi inqabile kakhulu, incinci kakhulu ukufikelela kwilaphu ngesantya sempembelelo enkulu.Ngoko ke kufuneka kubekho inkqubo yegridi enengqiqo ukuxhasa inkqubo yocingo.Umgama phakathi kwemilenze yomibini yamacandelo asemgangathweni yi-intshi eyi-0.1 (2.54 mm), ngoko ke isiseko senkqubo yegridi siqhele ukusetwa kwi-intshi eyi-0.1 (2.54 mm) okanye inani elipheleleyo lokuphindaphinda ngaphantsi kwe-intshi eyi-0.1, njenge: 0.05 intshi. , 0.025 intshi, 0.02 intshi, njl.
6. Ukujonga uMthetho woYilo (i-DRC)
Emva kokuba uyilo lwe-wiring lugqityiwe, kuyimfuneko ukujonga ngononophelo ukuba ngaba i-wiring design ihambelana nemithetho ebekwe ngumyili, kunye nokuqinisekisa ukuba imigaqo emiselweyo iyahlangabezana neemfuno zenkqubo yokuvelisa ibhodi yesekethe eprintiweyo, ngokuqhelekileyo ihlola imiba elandelayo: umgca kunye nomgca, umgca kunye nomgca wecandelo, umgca kunye nomngxuma wokudlula, umgca wecandelo kunye nomngxuma, nokuba umgama phakathi komngxuma kunye nomngxuma ufanelekile kwaye uyahlangabezana neemfuno zemveliso.Ngaba ububanzi bamandla kunye nemigca yomhlaba ifanelekile, kwaye ngaba kukho ukudibanisa okuqinileyo (i-impedance ephantsi yamaza) phakathi kwamandla kunye nemigca yomhlaba?Ngaba kusekho iindawo kwi-PCB apho umgca osezantsi unokwandiswa.Ngaba awona manyathelo afanelekileyo athathwe kwimigca yeempawu ezibalulekileyo, njengobude obufutshane, ukongeza imigca yokukhusela, kunye nemigca yokufaka kunye nemveliso ihlukaniswe ngokucacileyo.Ingaba i-analog kunye ne-digital circuit circuits zinemigca yazo eyahlukileyo yomhlaba.Nokuba imizobo (umz. ii-iyikhoni, iileyibhile zenqaku) ezongezwe kamva kwi-PCB zinokubangela isignali emfutshane.Ukuguqulwa kwemigca yemigca engafunekiyo.Ngaba kukho umgca wenkqubo owongeziweyo kwi-PCB?Ngaba i-solder yokuxhathisa ihlangabezana neemfuno zenkqubo yemveliso, ubukhulu be-solder ukumelana efanelekileyo, kwaye iimpawu zomlinganiswa zicinezelwe kwiiphedi zesixhobo ukuze zingachaphazeli umgangatho wofakelo lombane.Ngaba umphetho isakhelo sangaphandle amandla umhlaba umaleko kwibhodi multilayer kuncitshiswe, ezifana umaleko umhlaba amandla ifoyile yobhedu evezwe ngaphandle kwebhodi uthambekele kwisekethe emfutshane.Isishwankathelo Injongo yolu xwebhu kukucacisa ukusetyenziswa kwe-PADS eprintiweyo yoyilo lwebhodi yesekethe isoftware PowerPCB yenkqubo yoyilo lwebhodi yesekethe eprintiweyo kunye neengqwalasela ezithile kwiqela elisebenzayo labayili ukubonelela ngeenkcukacha zoyilo ukuququzelela unxibelelwano phakathi kwabaqulunqi kunye nokujongana.