Kubva kuPCB World
Kune zvigadzirwa zvemagetsi, imwe huwandu hwekupisa hunogadzirwa panguva yekushanda, kuitira kuti kupisa kwemukati kwemidziyo kusimuke nokukurumidza.Kana kupisa kusina kupera munguva, midziyo icharamba ichipisa, uye chigadziro chichakundikana nekuda kwekupisa.Kuvimbika kwemidziyo yemagetsi Performance ichaderera.
Nokudaro, zvakakosha zvikuru kuitisa kurapa kwakanaka kwekupisa kupisa pabhodhi redunhu.Kupisa kwekupisa kwePCB redunhu bhodhi chinhu chakakosha chekubatanidza, saka ndeipi nzira yekubvisa kupisa yePCB redunhu bhodhi, ngatikurukurei pamwe pazasi.
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Kupisa kupisa kuburikidza nePCB bhodhi pachayo Mabhodhi ePCB anoshandiswa pari zvino imhangura yakapfeka / epoxy girazi jira substrates kana phenolic resin girazi jira substrates, uye zvishoma zvemapepa-based copper clad board anoshandiswa.
Kunyangwe aya ma substrates aine akanakisa emagetsi zvivakwa uye zvivakwa zvekugadzirisa, ane hurombo hwekupisa kupisa.Senzira yekupisa kupisa kwezvikamu zvekupisa zvakanyanya, zvinenge zvisingakwanisi kutarisira kupisa kunoitwa neresin yePCB pachayo, asi kubvisa kupisa kubva pamusoro pechikamu kusvika kumhepo yakapoteredza.
Zvisinei, sezvo zvigadzirwa zvemagetsi zvakapinda munguva yeminiaturization yezvikamu, kukwirira kwepamusoro-density, uye kuungana kwepamusoro-kupisa, hazvina kukwana kuvimba nepamusoro pechikamu chine nzvimbo shoma shoma kuti iparadze kupisa.
Panguva imwecheteyo, nekuda kwekushandiswa kwakawanda kwezvikamu zvepamusoro zvepamusoro zvakadai seQFP neBGA, kupisa kunogadzirwa nezvikamu kunotamirwa kubhodhi rePCB muhuwandu hwakawanda.Nokudaro, nzira yakanakisisa yekugadzirisa kupisa kwekushisa ndeyekuvandudza simba rekupisa kupisa kwePCB pachayo iyo inosangana zvakananga nechokupisa.Kuitwa kana kuvhenekerwa.
PCB chimiro
Zvigadzirwa zvinopisa zvinopisa zvinoiswa munzvimbo inotonhora yemhepo.
Iyo tembiricha yekuona mudziyo inoiswa munzvimbo inopisa zvakanyanya.
Midziyo iri pabhodhi rakadhindwa rimwe chete inofanira kurongeka sezvinobvira maererano nekoriori yavo inokosha uye dhigirii yekupisa kupisa.Midziyo ine diki calorific kukosha kana kushomeka kwekupisa (senge madiki masaini transistors, madiki-akabatanidzwa maseketi, electrolytic capacitors, nezvimwewo) inofanira kuiswa mumhepo inotonhorera.Iyo yepamusoro-soro inoyerera (pamusuwo), michina ine kupisa kukuru kana kupisa kupisa (senge simba transistors, yakakura-yakakura yakasanganiswa maseketi, nezvimwewo) inoiswa kune yakanyanya kudzika kwemhepo inotonhorera.
Munharaunda yakatwasuka, zvigadziriso zvine simba-akakwirira zvinoiswa pedyo nekumucheto kwebhodhi rakadhindwa sezvinobvira kupfupisa nzira yekupisa kupisa;kudivi rakatwasuka, michina ine simba guru inoiswa padyo nepamusoro pebhodhi rakadhindwa sezvinobvira kuti kuderedze kukanganiswa kwemidziyo iyi pakudziya kwezvimwe zvigadziri pazvinoshanda.
Kupisa kwekupisa kwebhodhi rakadhindwa mumidziyo inonyanya kutsamira pakuyerera kwemhepo, saka nzira yekuyerera kwemhepo inofanira kudzidzwa panguva yekugadzira, uye mudziyo kana bhodhi redunhu rakadhindwa rinofanira kugadzirwa zvine musoro.
Zvinowanzonetsa kuwana kugovewa kwakasimba kweyunifomu panguva yekugadzira, asi nzvimbo dzine simba rakawandisa remagetsi dzinofanira kudziviswa kudzivirira nzvimbo dzinopisa kubva pakukanganisa kushanda kwakajairika kwedunhu rese.
Kana zvichibvira, zvakakosha kuti uongorore kushanda kwekushisa kwechinyorwa chakadhindwa.Semuyenzaniso, iyo yekupisa inoshanda index yekuongorora software module yakawedzerwa mune imwe nyanzvi PCB dhizaini software inogona kubatsira vagadziri kukwenenzvera dhizaini yedunhu.
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Zvikamu zvinopisa zvinopisa zvakanyanya pamwe nemaradiyeta uye mahwendefa ekuitisa kupisa.Kana huwandu hushoma hwezvikamu muPCB huchigadzira huwandu hwekupisa (pasi pe3), singi yekupisa kana pombi yekupisa inogona kuwedzerwa kune zvinopisa zvinogadzira.Kana tembiricha isingadzikiswe, inogona kushandiswa A radiator ine feni kuti iwedzere kupisa kupisa mhedzisiro.
Kana huwandu hwemidziyo yekudziya yakakura (kupfuura 3), chivharo chikuru chekupisa kupisa (bhodhi) chinogona kushandiswa, inova singi yakakosha yekupisa yakagadziridzwa zvichienderana nenzvimbo uye kureba kwemudziyo wekudziya paPCB kana furati hombe. kupisa singi Cheka zvakasiyana chikamu urefu zvinzvimbo.Chifukidziro chekupisa kupisa chinosungirirwa pamusoro pechikamu, uye chinobata chikamu chimwe nechimwe kuti chibvise kupisa.
Zvisinei, kupisa kwekushisa hakuna kunaka nekuda kwekusagadzikana kwehurefu panguva yegungano uye welding yezvikamu.Kazhinji, iyo yakapfava yekupisa chikamu shanduko yekupisa pad inowedzerwa pamusoro peiyo chikamu kuti ivandudze kupisa kupisa mhedzisiro.
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Kune michina inotora yemahara convection mhepo kutonhora, zviri nani kuronga akasanganiswa maseketi (kana mamwe maturusi) akatwasuka kana akatwasuka.
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Adopt inonzwisisika wiring dhizaini kuti uone kupisa kupisa.Nekuti resin mundiro ine urombo hwekupisa conductivity, uye mitsetse yemhangura foil nemakomba zvakanaka kupisa conductors, kuwedzera yakasara mwero yemhangura foil uye kuwedzera kupisa conduction makomba ndiyo nzira huru kupisa dissipation.Kuti uongorore simba rekupisa kupisa kwePCB, zvinodikanwa kuverenga iyo yakaenzana yekupisa conductivity (mapfumbamwe eq) yezvinhu zvakaumbwa zvakaumbwa nezvinhu zvakasiyana-siyana zvine siyana yekupisa yekupisa-iyo insulating substrate yePCB.
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Midziyo iri pabhodhi rakadhindwa rimwe chete inofanira kurongeka sezvinobvira maererano nekoriori yavo inokosha uye dhigirii yekupisa kupisa.Midziyo ine low low calorific value kana kutadza kupisa kupisa (sediki-signal transistors, madiki-scale integrated circuits, electrolytic capacitors, etc.) inofanira kuiswa mumhepo inotonhorera.Iyo yepamusoro-soro inoyerera (pamusuwo), michina ine kupisa kukuru kana kupisa kupisa (senge simba transistors, yakakura-yakakura yakasanganiswa maseketi, nezvimwewo) inoiswa kune yakanyanya kudzika kwemhepo inotonhorera.
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Munharaunda yakatwasuka, zvigadziriso zvepamusoro-simba zvakarongedzerwa pedyo nekumucheto kwebhodhi rakadhindwa sezvinobvira kupfupisa nzira yekupisa kupisa;munzira yakatwasuka, michina yemagetsi-yepamusoro yakarongwa padyo sezvinobvira kumusoro kwebhodhi rakadhindwa kuti kuderedze pesvedzero yezvishandiso izvi pakupisa kwemamwe maturusi..
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Kupisa kwekupisa kwebhodhi rakadhindwa mumidziyo inonyanya kutsamira pakuyerera kwemhepo, saka nzira yekuyerera kwemhepo inofanira kudzidzwa panguva yekugadzira, uye mudziyo kana bhodhi redunhu rakadhindwa rinofanira kugadzirwa zvine musoro.
Kana mhepo ichiyerera, inogara ichiyerera munzvimbo dzine kushomeka kushoma, saka kana uchigadzira midziyo padhinda redunhu bhodhi, dzivisa kusiya nzvimbo huru yemhepo mune imwe nzvimbo.
Kugadziriswa kweakawanda akadhindwa edunhu mabhodhi mumushini wese anofanirwawo kutarisisa kune rimwe dambudziko.
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Chishandiso chinonzwa tembiricha chinonyatsoiswa munzvimbo yakadzikira tembiricha (sepasi pemudziyo).Usambofa wakaiisa zvakananga pamusoro pemudziyo wekudziya.Zvakanakisa kudzedzereka midziyo yakawanda pane yakachinjika ndege.
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Isa midziyo ine simba repamusoro rekushandisa uye chizvarwa chekupisa pedyo nepamusoro penzvimbo yekupisa kupisa.Usaisa zvigadziro zvekupisa zvakanyanya pamakona uye kumativi emativi ebhodhi rakadhindwa, kunze kwekunge kunyura kwekupisa kwakarongwa pedyo nayo.Paunenge uchigadzira chidziviriro chemagetsi, sarudza chigadziri chakakura sezvinobvira, uye uite kuti ive nenzvimbo yakakwana yekupisa kupisa paunenge uchigadzirisa marongerwo ebhodhi rakadhindwa.
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Dzivisa kuwanda kwenzvimbo dzinopisa paPCB, govera simba zvakaenzana paPCB board zvakanyanya sezvinobvira, uye chengetedza tembiricha yePCB pamusoro pekuita yunifomu uye isingachinji.
Zvinowanzonetsa kuwana kugovewa kwakasimba kweyunifomu panguva yekugadzira, asi nzvimbo dzine simba rakawandisa remagetsi dzinofanira kudziviswa kudzivirira nzvimbo dzinopisa kubva pakukanganisa kushanda kwakajairika kwedunhu rese.
Kana zvichibvira, zvakakosha kuti uongorore kushanda kwekushisa kwechinyorwa chakadhindwa.Semuyenzaniso, iyo yekupisa inoshanda index yekuongorora software module yakawedzerwa mune imwe nyanzvi PCB dhizaini software inogona kubatsira vagadziri kukwenenzvera dhizaini yedunhu.