Amfani/halaye na kayan PCB da abubuwan da ke buƙatar kulawa

Yau PCB substrate substrate ya ƙunshi Cooper Foil, Reinforcement, resin da sauran manyan abubuwa guda uku, amma tun lokacin da aka fara aiwatar da Jagoranci, an ƙara ƙara foda na huɗu a cikin kwamitin PCB. Don inganta zafin juriya na PCB.

Zamu iya tunanin allurar jan ƙarfe azaman tasoshin jini na jikin ɗan adam, waɗanda ake amfani da su don jigilar jini mai mahimmanci, don PCB ta iya kunna ikon aiki; Za a iya tunanin ƙarfafawa azaman ƙasusuwan ɗan adam, waɗanda aka yi amfani da su don tallafawa da ƙarfafa PCB ba za su faɗi ba; Resin, a gefe guda, ana iya ɗaukarsa azaman tsokar jikin mutum, babban ɓangaren PCB.

An bayyana amfanin, halaye da abubuwan da ke buƙatar kulawa da waɗannan kayan PCB huɗu a ƙasa:

1. Rufe Bakin Karfe

Electric Circuit: Circuit da ke gudanar da wutar lantarki.

Layin sigina: lamba da ke aika saƙo.

Vcc: Layer samar da wutar lantarki, ƙarfin aiki. Yawan ƙarfin wutar lantarki na samfuran lantarki na farko galibi an saita shi azaman 12V. Tare da juyin halitta na fasaha da buƙatun ceton wutar lantarki, a hankali ƙarfin wutar lantarki ya zama 5V da 3V, kuma yanzu a hankali yana motsawa zuwa 1V, kuma buƙatun murfin jan ƙarfe shima yana ƙaruwa.

GND (Ƙasa): Ƙasa ta ƙasa. Ana iya ɗaukar Vcc a matsayin hasumiyar ruwa a cikin gida, lokacin da muka buɗe famfo, ta hanyar matsin ruwa (ƙarfin aiki) za a sami ruwa (lantarki) ya fita, saboda aikin sassa na lantarki an ƙaddara ta kwararar electrons; GND shine magudanar ruwa. Duk ruwan da ake amfani da shi ko wanda ba a amfani da shi yana gangarowa daga magudanan ruwa. In ba haka ba famfon zai ci gaba da malalewa kuma gidanka zai cika da ruwa.

Watsawar Heat (saboda Babban Haƙƙin Zazzabi): Watsawar Zafi. Shin kun taɓa jin wani CPU mai zafi don dafa ƙwai, wannan ba ƙari bane, yawancin abubuwan lantarki zasu cinye makamashi da haifar da zafi, a wannan lokacin yana buƙatar ƙera babban yanki na murfin jan ƙarfe don sakin zafi cikin iska da zaran mai yiwuwa, in ba haka ba ba kawai ɗan adam ba zai iya jurewa ba, har ma sassan lantarki suma za su bi injin.

Ƙarfafawa.

Lokacin zaɓar kayan ƙarfafawa na PCB, dole ne ya kasance yana da kyawawan halaye masu zuwa. Yawancin kayan ƙarfafa PCB da muke gani an yi su da GF (Fiber Glass). Idan kuka duba da kyau, kayan Gilashin Fiber kaɗan ne kamar layin kamun kifi. Saboda fa’idodin halaye na gaba, galibi ana amfani dashi azaman kayan PCB.

Babban Stiffness: Yana sa PCB ba mai sauƙin canzawa ba.

Ƙarfin Ƙarfi: Ƙarfin Ƙarfi mai kyau.

Ƙananan CTE: yana ba da ƙarancin “ƙimar haɓaka zafi” don hana lambobin kewaye a cikin PCB cirewa da haifar da gazawa.

Low Warpage: tare da Naƙasasshe naƙasasshe, wato Ƙananan lanƙwasa farantin, warping farantin.

Babbar ulesauka: Babbar Matasa

3. Matin Resin

Alkaluman FR4 na gargajiya sun mamaye epoxy, LF (Lead Free)/HF (Halogen Free) an yi su da resins iri-iri da wakilai masu warkarwa daban-daban, suna yin farashin LF kusan 20%, HF kusan 45%.

HF farantin yana da sauƙin fashewa da haɓaka ruwan sha, lokacin farin ciki da babban farantin yana da haɗari ga CAF, ya zama dole a yi amfani da mayafin fiber mai buɗewa, mayafin fiber mai ɗorewa, da ƙarfafa kayan da ke ɗauke da nutsewa ɗaya.

Kyakkyawan resin dole ne ya kasance yana da halaye masu zuwa:

Kyakkyawan Resistance. Haɗin zafi sau biyu zuwa sau uku bayan farantin ba zai fashe ba, yana da kyau juriya mai zafi.

Ƙananan Ruwan Ruwa: Ƙananan Ruwa. Sha ruwa shine babban dalilin fashewar jirgi na PCB.

Retardance na harshen wuta: Dole ne a jinkirta harshen wuta.

Ƙarfin Peel: Tare da “Ƙarfin hawaye”.

Babban Tg: Babban wurin canza yanayin gilashi. Yawancin kayan da ke da babban Tg ba su da sauƙin sha ruwa, kuma ainihin dalilin rashin fashewar jirgi ba ruwan sha bane, maimakon babban Tg.

Kun ce Tauri yana da girma. Mafi girman taurin, ƙaramin fashewar jirgin. Ana kiran Ƙarfin farantin “ƙagewar makamashi,” kuma mafi kyawun kayan shine, mafi kyawun zai iya yin tsayayya da tasiri da lalacewa.

Kayayyakin Dielectric: Babban kaddarorin Dielectric, watau kayan rufewa.

4. Tsarin Fillers (foda, filler)

A farkon matakin walda gubar, zafin jiki bai yi yawa ba, kuma har yanzu hukumar PCB na iya jurewa. Tun da walda ba tare da gubar ba, zazzabi ya ƙaru, don haka an ƙara foda a cikin allon PCB don sa PCB ta yi tsayayya da zafin jiki.

Yakamata a haɗa masu cikawa da farko don inganta watsawa da ƙwanƙwasawa.