Mathata a taolo a bataletseng le boholo ho li-stack-ups tsa PCB tse 2-layer

Rea u amohela ho blog ea Capel, moo re buisanang ka lintho tsohle tse amanang le tlhahiso ea PCB. Sengoliloeng sena, re tla sebetsana le liphephetso tse atileng kahong ea li-stackup tsa 2-layer PCB le ho fana ka litharollo tsa ho rarolla mathata a taolo le boholo.Capel esale e le moetsi ea ka sehloohong oa Rigid-Flex PCB, Flexible PCB, le HDI PCB ho tloha 2009. Re na le baenjiniere ba fetang 100 ba nang le boiphihlelo ba nang le phihlelo ea lilemo tse fetang 15 indastering ea PCB 'me re ikemiselitse ho fa bareki PCB ea boleng bo phahameng. tharollo.

Bophatlalatsike karolo ea bohlokoa e lokelang ho nahanoa ha u sebetsa le PCB stackups kaha e ama ka ho toba tshebetso ka kakaretso le ho tšepahala ha sehlahisoa sa ho qetela. PCB e bataletseng e bohlokoa bakeng sa ho kopanya hantle, ho beha likarolo tse nepahetseng, le ho qhala mocheso ka katleho. Ho kheloha leha e le hofe ho tloha ho bataletseng ho ka lebisa ho sebopeho se fokolang sa solder, ho se lumellane ha likarolo, kapa esita le khatello ea maikutlo holim'a boto ea potoloho e ka lebisang ho lifupi tsa motlakase kapa ho bula.

Taolo ea boholoke ntlha e 'ngoe ea bohlokoa molemong oa moralo oa PCB, kaha e netefatsa hore boto e tla lekana hantle ka har'a sebaka sa eona se khethiloeng. Taolo e nepahetseng ea litekanyo e lumella PCB hore e ikopanye le sehlahisoa sa ho qetela, e qoba ho kena-kenana le likarolo tse ling kapa likarolo tsa sebopeho.

Ha re hlahlobeng litharollo tse ling tse sebetsang tsa ho hlola maemo a bataletseng le taolo ea maemo ho li-stackups tsa PCB tse 2-layer.

1. Khetho ea lintho tse bonahalang:
Ho khetha thepa e nepahetseng ke motheo oa PCB e bataletseng. Khetha li-laminate tsa boleng bo holimo tse nang le botsitso bo botle ba sebopeho. Nahana ka ho sebelisa lisebelisoa tse tlaase tsa CTE (coefficient of thermal expansion) tse kang FR-4, tse fokotsang kotsi ea ho loana ka lebaka la ho fetoha ha mocheso nakong ea tlhahiso kapa tšebeliso.

2. Taelo e nepahetseng ea stacking:
Ho hlophisoa ha likarolo ka har'a stack ho ka ama ho bata haholo. Etsa bonnete ba hore likarolo li tsamaellana hantle le hore lisebelisoa tsa mantlha le tsa prepreg li abuoa ka symmetrically. Ho leka-lekanya kabo ea likarolo tsa koporo ka har'a stack ho boetse ho khothalletsa ho atolosoa ha mocheso o tšoanang, ka hona ho fokotsa monyetla oa ho loana.

3. Tsela e laolehileng ea ho sitisa:
Ho kenya ts'ebetsong mekhoa e laoloang ea impedance ha e bohlokoa feela bakeng sa botšepehi ba matšoao empa hape ho thusa ho boloka ho bata. Sebelisa mekhoa e laoloang ke impedance ho thibela ho fapana ho feteletseng ha botenya ba koporo ho pholletsa le boto, ho ka bakang ho kobeha kapa ho sotha.

4. Vias le plated ka masoba:
Ho ba teng ha vias le plated ka masoba (PTH) ka hlahisa lintlha khatello ea kelello le ama flatness. Qoba ho beha vias kapa PTHs libakeng tseo ba ka sekisetsa sebopeho sa botšepehi ba boto. Sebakeng seo, nahana ka ho sebelisa li-vias tse sa boneng kapa tse patiloeng ho fokotsa likhohlano leha e le life tse ka bakoang ke ho cheka kapa ho pola.

5. Taolo ea mocheso:
Ho etsa bonnete ba hore mocheso o sebetsa hantle ke oa bohlokoa ho boloka ho bata. Thermal vias sebelisoa ho susumelletsa mocheso hōle le matheba a chesang ka boto oa potoloho. Ho feta moo, nahana ka ho sebelisa sefofane sa koporo kapa sink ea mocheso ho felisa mocheso ka katleho. Taolo e lekaneng ea mocheso ha e thibele feela ho loana, empa hape e ntlafatsa ts'epahalo e akaretsang ea PCB.

6. Mokhoa o nepahetseng oa tlhahiso:
Sebetsa le moetsi ea tsebahalang joalo ka Capel ea nang le boiphihlelo bo bongata ba ho hlahisa li-PCB tsa boleng bo holimo. Mekhoa e tsoetseng pele ea tlhahiso, ho kenyelletsa le etching e nepahetseng, lamination e laoloang le ho hatella ka mekhahlelo e mengata, li bohlokoa ho fihlela ho bata le taolo ea maemo.

7. Mehato ea taolo ea boleng:
Mehato e tiileng ea taolo ea boleng e sebelisoa nakong eohle ea tlhahiso. Sena se kenyelletsa tlhahlobo ea khafetsa, mekhoa e tsoetseng pele ea metrology le ho latela maemo a indasteri. Taolo e sebetsang hantle ya boleng e netefatsa hore ditlhoko tsa taolo e bataletseng le tsa dimensioni di a kgotsofatswa kamehla.

Ka kakaretso,ho bata le ho laola litekanyo li bohlokoa katlehong ea 2-layer PCB stackup. Ka ho khetha ka hloko lisebelisoa, ho latela tatellano e nepahetseng ea stacking, ho kenya ts'ebetsong mokhoa o laoloang oa ho thibela mocheso, ho laola mocheso ka katleho, le ho sebetsa le moetsi ea nang le phihlelo joaloka Capel, o ka hlōla mathata ana 'me oa finyella ts'ebetso e phahameng ea PCB. Se ke oa inehela ho boleng ba PCB - tšepa Capel ho fihlela litlhoko tsohle tsa hau tsa PCB.