Ukunyamezelana kuyichaphazela njani imveliso?

Isivuno sePCB edityaniswe ngokupheleleyo okanye I-PCB Assembly ngokuqhelekileyo inxulumene nokwakhiwa kwenani elikhulu leebhodi, ezithi kwiimeko ezininzi zifuna utshintsho ukusuka kwiprototype ukuya kwimveliso yobuninzi. Kwezinye iimeko; ngokukodwa kuyilo olukhethekileyo lweenkqubo ezibalulekileyo ze-aerospace, izixhobo zonyango kunye nezicelo zoshishino, ukuveliswa kweebhetshi ezincinci kwinqanaba lokugqibela lokuvelisa. Ingaba ibhetshi encinci okanye ibhetshi enkulu, injongo yenqanaba lokugqibela lemveliso yePCBA lukhetho olugqibeleleyo lwesivuno okanye iziphene zebhodi zero, ukuze isetyenziswe njengoko kulindelwe.

Isiphene se-PCB esinokuba ngunobangela osisiseko wokwenziwa kwemveliso inokuba sisiphene soomatshini. Okufana ne-delamination, ukugoba okanye ukuphuka kwinqanaba elingabonakaliyo, kunokuphazamisa ukusebenza kombane; umzekelo, ungcoliseko okanye ukufuma ngaphakathi okanye ngaphakathi ebhodini. Ibhodi yesekethe edibeneyo nayo iya kuba manzi kwaye ingcolise. Ke ngoko, kungcono ukusebenzisa iindlela zePCB zobungqina bokufuma ngexesha nasemva kokwenziwa. Ukongeza kwiziphene ezinokuthi zingafumaneki phambi kokuba ibhodi yesekethe ifakwe kwaye isetyenziswe, kukho iziphene ezicacileyo ezinokwenza ukuba ibhodi yesekethe ingasetyenziswa.

Inani leebhodi eziveliswayo zahlulwe ngenani leebhodi ezikhoyo sisivuno. Umahluko linani leebhodi ezineziphene ezifuna ukulungiswa kwakhona (ezinye izenzo kufuneka zithathwe ukulungisa iziphene ezincinci kunye nokuzisa ibhodi kwisimo esisebenzisekayo). Kwi-PCBA engenakulungiswa ngokusebenza kwakhona, kusenokufuneka ukuba yenziwe ngokutsha. Oku kusenokuthetha iiyure zabantu ezongezelelweyo, kunye nokunyuka kweendleko zokwenziwa nokuvavanya.

Indlela yokuphucula ukunyamezela kwe-PCB

Ukubaluleka kokukhetha kwakho inkonzo yeNdibano ayinakugqithiswa. Ukwenza ukhetho olufanelekileyo kunokuba ngumahluko phakathi kweebhodi ezifumanayo ezenzelwe ukuhlangabezana okanye ukudlula imigangatho yokulawula. Ukuhlelwa kwe-IPC okanye akunjalo. Ngokufanayo, uncedo lwe-DFM alunakugqithiswa kuphuhliso lwakho lwePCBA. Izigqibo ezenziwe ngolungelelwaniso ngaphakathi kokunyamezelana kwePCB kwezixhobo zeCM kunye neenkqubo ziqinisekisa ukuba ibhodi yakho yesekethe inokwakhiwa ngokwenene. Izithintelo ezichazwe yimigaqo ziseka imida eyamkelekileyo yoluhlu lonyamezelo lweCM’s DFM. Unyamezelo lwePCB olukhethayo kufuneka lube phakathi kolu luhlu.

Uluhlu olupheleleyo lwezixhobo zeCM kwinyathelo elithile lokuvelisa lichaza ifestile yayo yokucubungula. Umzekelo, ubuncinci bedayamitha yomgodi wokugrumba ichaza ubuncinci ububanzi befestile yenkqubo esetyenzisiweyo ukwenza umngxuma wokutyhutyha. Ngokunjalo, ubukhulu bomngxuma ububanzi buchaza ubuninzi befestile yokusetyenzwa kwefestile esetyenziselwa ukwenza umngxuma. Ngethuba nje le milinganiselo yomzimba ihlangabezana neemfuno zomthetho, unokukhetha ngokukhululekileyo nayiphi na isayizi ngaphakathi koluhlu. Nangona kunjalo, ukukhetha iimeko ezigqithisileyo lolona khetho lubi kakhulu kuba lubeka uxinzelelo olungakumbi kwinkqubo yokomba ukuze luchaneke ngakumbi kwaye ukuba nokwenzeka kwempazamo kukhulu. Ngokwahlukileyo, indawo ephakathi yefestile yenkqubo yokhetho lolona khetho lungcono, kunye nempazamo encinci enokwenzeka. Ke ngoko, nciphisa amathuba okuba isiphene sinzima ngokwaneleyo ukwenza ibhodi yakho yesekethe ingasetyenziswa.

Ngokukhetha ukunyamezela kwe-PCB okanye kufutshane neziko lenkqubo yefestile kumanyathelo okuvelisa ibhodi yesekethe, ukuba nokwenzeka kweziphene zebhodi yesekethe kunokuncitshiswa ukuya kutsho ku-zero, kwaye impembelelo engalunganga yeziphene zenkqubo elungisekayo kwisivuno inokupheliswa.