A PCB or yakadhindwa redunhu bhodhi inogadzira kupisa kana magetsi emagetsi achiyerera napo. Pasina kuputira kwakakodzera, kupisa uku kunogona kukonzera matambudziko akakomba ePCBS.

Nei PCBS ichida kuputirwa?

Usati wanzwisisa kuputira kwePCB, unofanirwa kunzwisisa: Chii chinonzi PCB?

PCBS, or printed circuit boards, are small green squares with copper sheets (but also in other colors). It can be found in almost any electronic device! Akadhindwa mabhodhi edunhu anogonesa michina yemagetsi kuti ishande nemazvo, ichivaita yakakosha asi isingaonekwe chikamu chehupenyu hwezuva nezuva. Pasina ivo, makomputa, nhare, materevhizheni uye zvemagetsi zvaisazoshanda kana kuvapo.

Electrical ine simba kwazvo pcb. PCBS contain printed copper wires, so they naturally conduct electricity. Nekudaro, zvemagetsi zvigadzirwa zvinogona kuisa njodzi kana zvisina kuvharirwa mune isina-kuitisa dzimba kana kupisa zvakanyanya. Iyo pcb inofanirwa kuvezwa kuti idzivise kukora kwemhangura uye kudzikisira netsaona nekusangana nezvinhu zvekuitisa. Proper insulation can help prevent the PCB from overheating or exploding.

There are several ways to isolate a PCB. There are several common insulation materials, but the exact type of insulation usually depends on the application of the PCB design.

Photo source: pixabay

Pcb insulating zvinhu

Zvakajairika pcb kuputira zvinhu zvinowanzo kuumbwa seasina-anoitisa substrates ayo anogona kusunganidzwa pamwechete mumatanda akawanda kubvumira yazvino kuyerera nenzira kwayo kuburikidza neese wedunhu bhodhi. Yakareruka PCBS inogona kuve imwechete-mativi kana imwechete-yakaturikidzana. Complex PCBS, such as those used for high-speed digital communications, may contain more than two dozen layers.

PCB insulation calculator can help you determine creepage distance and electrical clearance, which will be the determining factor in the exact type and quantity of insulation material. Creepage chinhambwe ipfupi pakati penzvimbo dzinoitisa, uye clearance ndicho chinhu chakaparadzaniswa nemhepo kwete substrate. Kunzwisisa chinhambwe chinhambwe uye kubviswa kwemagetsi kwakakosha pakuverenga PCB kuputira.

Vagadziri vePCB vanogona kusarudza kushandisa zvakasiyana siyana zvigadzirwa zvekudzivirira, kubva kumapurasitiki asingadhuri senge FR-2 kune simbi dzakakora senge aluminium. The insulating material of a PCB usually determines its use. Semuenzaniso, iyo pcb mune yakachipa inogadzirwa yemagetsi toy haingade iyo yakafanana mhando yekuisa sePCB mune satellite.

Kuti tinzwisise zviri nani pcb kuputira uye kuputira zvinhu, ngationgororei nzira shanu dzinozivikanwa dzePCB kuputira.

FR-2

Fr-2 yakaderera giredhi murazvo retardant laminate sarudzo. It is made from a composite of paper and plasticized phenolic resin, making it light and durable. Imwe-mativi wedunhu mabhodhi anowanzo shandisa ichi chinhu. Iyo FR-2 haina halogen-isina uye hydrophobic uye inogona kumanikidzwa nyore kana kuumbiwa. Iyo FR-2 ndeimwe yesarudzo dzakachipa pamutengo wePCB uye isarudzo yakajairika kumakambani anoita zvemagetsi evatengi.

FR-4

Fr-4 iri yepamusoro murazvo retardant laminate kuita. Icho chinhu chakasanganiswa chakagadzirwa neshinda yegirazi yegirazi uye inowanzo shandiswa mukugadzira kwakapetwa-mativi uye akawanda-masenduru PCBS. Iyo FR-4 inogona kumira tembiricha yakakwira uye kumanikidza kwemuviri kupfuura iyo FR-2. Ichowo chinhu chinodhura, chichiita icho sarudzo inozivikanwa kune vagadziri vepamusoro-magumo emagetsi emagetsi. Iyo FR-4 haina kugadzirwa nekukurumidza, inoda kugaya, kutsikisa kana machined tungsten carbide maturusi.

Radio frequency (rf)

RF substrates yakagadzirirwa kubvumira PCB kushanda muzvishandiso uchishandisa yakakwira simba RF uye microwave. RF substrates inowanzo shandiswa PCBS yakaiswa mune zvechiuto zvemagetsi, avionics uye avionics. Izvo zvakakosha kuti uzive, zvisinei, kuti vamwe vatengi zvigadzirwa zvemagetsi zvine iyi mhando ye substrate. Mapurasitiki anogadzira akajairwa RF substrate haaburitse yakawanda yekuisa uye anoita mushe pabasa rekugadzira mafashama makuru. RF uye microwave PCB inowanzove nechero imwechete kana maviri akaturikidzana.

tefa

Kunyangwe akawanda akadhindwa wedunhu mabhodhi ari akati sandara uye akaomarara, kune mamwe matsva PCBS anogona kukotama mune ingangoita chero nzira pasina kutyora. Masekete anochinjika anoda akafanana asi akasarudzika mafomu ekuputira. Flexible circuits inowanzo chengetedzwa neA SPRAY yePCB insulation, kuwedzera kune epurasitiki firimu isarudzo inozivikanwa. Anochinjika macircuit anoda matete, akasimba pcb kuputira unhani kuitira kuti vagone kufamba zvakasununguka uye kukwana munzvimbo dzakasimba Spaces.

simbi

Sarudzo yesimbi senge insulator ingaite senge inoshamisa. Simbi dzinowanzoita magetsi, uye kuitisa netsaona kunogona kukonzera PCB kukundikana, kubata moto kana kusungunuka. However, in some cases, a PCB with a metal substrate may be more advantageous. Simbi ndiyo yakanakisa conductor yekupisa uye inogona kumira nemasaisai akakura pasina kutyora kana kupisa. PCBS yakaiswa mune yemagetsi inobhadharisa michina iyo inoshandisa yakawanda simba ingangoda simbi substrates kuti ishande zvinobudirira.

Maindasitiri pesvedzero

Kuchengetedza iyo pcb kubva pakupisa, kubata moto, kana kubata moto, inofanirwa kuve yakachengetedzwa zvakakwana. The type of insulation corresponds to the type of use provided by the PCB.

General-chinangwa chemagetsi PCBS akakodzera kushandiswa neakareruka uye anodhura-anodhura FR-2 kana FR-4 substrates. RF substrates zvakanyanya kukodzera kunyorera kunosanganisira yakakwira simba RF.

Flexible substrates senge mapurasitiki akakodzera kuti asangane nezvinodiwa zvekuputira zvemabhodhi edunhu anotenderera. Metali, kune rimwe divi, akanakisa mafambisi ekupisa uku achichengeta magetsi emagetsi achitonhorera.