Lintho tse 5 tseo U Lokelang ho li Ela Hloko Ha Flex PCB Soldering

Soldering flexible printed circuit boards (PCBs) ke ts'ebetso e bobebe e hlokang ho nepahala le kutloisiso e tebileng ea lisebelisoa le maemo a amehang. Ho fapana le li-PCB tsa setso tse thata, li-PCB tse tenyetsehang li tla le liphephetso tse ikhethang ka lebaka la tlhaho ea tsona e kobehang le lisebelisoa tse sebelisitsoeng kahong ea tsona. Hore na o sebetsa lipotolohong tse feto-fetohang bakeng sa lisebelisoa tsa elektroniki tsa bareki, lisebelisoa tsa bongaka, kapa lits'ebetso tsa indasteri, ho fihlela ts'ebetso e nepahetseng ho hloka mokhoa o lumellanang le litlhoko tse ikhethileng tsa li-PCB tse feto-fetohang. Mona, re fana ka tataiso e felletseng e nang le malebela a bohlokoa bakeng sa ho rekisa ka katleho, liphoso tse tloaelehileng tseo u lokelang ho li qoba, le tharollo e tsoetseng pele ea litaba tse tloaelehileng.

Litlhahiso tsa Bohlokoa bakeng sa ho rekisoa ka katleho ha li-PCB tse bonolo

1. Ho Khetha Substrate e nepahetseng bakeng sa botsitso le ho tšoarella

Substrate ke mokokotlo oa PCB leha e le efe, e fanang ka botšepehi le tšehetso ea sebopeho. Bakeng sa li-PCB tse feto-fetohang, khetho ea substrate e bohlokoa le ho feta, kaha e tlameha ho kopanya ho feto-fetoha ha maemo le ho tšoarella. Lisebelisoa tse kang Kapton le lifilimi tsa polyimide li atisa ho sebelisoa bakeng sa ho feto-fetoha ha tsona, botsitso ba mocheso, le ho hanyetsa khatello ea kelello ea mochine. Lits'ebetsong tsa maqhubu a phahameng, lisebelisoa tse kang RO3000 le RO4000 li khethoa bakeng sa tahlehelo ea tsona e tlase ea dielectric le ho feto-fetoha ha maemo.

Keletso e Molemo: Khetha substrate e lumellanang le maemo a tikoloho a ts'ebeliso ea ho qetela, e shebaneng le botsitso ba mocheso le ho tenyetseha ho latela tikoloho ea ts'ebetso.

2. Ho Laola Mocheso ka Hloko

Ka lebaka la lisebelisoa tsa bona tse bonolo, li-PCB tse flexible li kotsing ea ho senyeha ha mocheso ha li bapisoa le liboto tse thata. Mocheso o feteletseng nakong ea ts'ebetso ea soldering e ka lebisa ho warping, ho senya PCB le likaroloana. Ho qoba sena, ho bohlokoa ho laola mocheso ka hloko nakong ea ts'ebetso ea soldering.

Mokhoa o mong o sebetsang ke ho sebelisa lisebelisuoa tsa sehokelo sa mocheso joalo ka pente ea mocheso kapa lisinki tsa mocheso ho abela mocheso ka ho lekana, ho thibela libaka tse chesang tse sebakeng sa heno. Ho feta moo, etsa bonnete ba hore lisebelisoa tsa hau tsa ho solder lia lekanngoa ho boloka mocheso o tsitsitseng le o laoloang.

Keletso e Molemo: Kenya mocheso butle-butle 'me u qobe ho phahama ha mocheso ka tšohanyetso ho thibela ho tšoha ha mocheso le ho sotha.

3. Ho Ntlafatsa Moralo le Boikarabelo ba Karolo

Sebopeho se nepahetseng sa likarolo ke sa bohlokoa bakeng sa soldering e sebetsang hantle. Ho se lumellane kapa mokhoa o fosahetseng oa likarolo o ka lebisa ho bofokoli ba soldering boo ho leng thata ho bo lokisa. Etsa bonnete ba hore likarolo tsohle li hlophisitsoe hantle 'me li hlophisitsoe ka tsela e tšoanang. Boloka sebaka se lekaneng pakeng tsa likarolo ho etsa hore ho be bonolo ho etsa tlhahlobo ea soldering le post-soldering. Qoba ho beha likarolo tsa SMD mahlakoreng ka bobeli a PCB ho thibela litaba tsa kabo ea mocheso nakong ea solder.

Keletso ea Bohlokoa: Haeba sekhomaretsi se sebelisoa ho lokisa likarolo, boloka bonyane sekheo sa 3mm pakeng tsa likarolo ho lumella mocheso ho phalla ka ho lekana nakong ea ts'ebetso.

4. Tsebo ea ho Hatisa ka Solder Paste

Ho hatisa peista ea solder ke karolo ea bohlokoa ea kopano ea PCB e tenyetsehang . Tšebeliso e nepahetseng e netefatsa likhokahano tse tšepahalang tsa motlakase le tsa mechini. Tšebeliso e mpe ea peista e ka lebisa ho senyeheng ho feteletseng kapa ho senyeheng ho lekaneng, e leng se ka behang ts'ebetso ea PCB kotsing.

Ho ntlafatsa khatiso ea solder paste, sebelisa li-stencil tsa boleng bo holimo 'me u netefatse hore printa e hlophisitsoe hantle. Ts'ebeliso e nepahetseng ea peista e ka ntlafatsa ts'epo ea PCB ka 60%.

Keletso e Molemo: Lekanya printara ea hau ea ho betla peista 'me u sebelise li-stencil tse nepahetseng ho netefatsa kabo e ntle ea peista le ho fokotsa kotsi ea liphoso.

5. Ho sebetsana le Mathata a Planarity

Ho boloka sebaka se bataletseng nakong ea soldering ke e 'ngoe ea liphephetso tse kholo ka ho fetisisa ha u sebetsa le flex PCBs. Ka lebaka la tlhaho ea bona e feto-fetohang, mapolanka ana a atisa ho inama le ho sotha, a ka amang boleng ba manonyeletso a solder. Ho fokotsa mathata ana, nahana ka ho sebelisa lisebelisoa tse lumellanang le RoHS le pele ho bokhachane ho thibela ntoa. Qoba ho fetoha ha mocheso ka potlako nakong ea soldering ho fokotsa kotsi ea ho fetoha le mocheso oa mocheso.

Keletso e Molemo: Sebelisa boemo ba mocheso bo tsitsitseng le bo butle-butle nakong ea ho kopanya ho solder ho fokotsa ho tenyetseha le ho thothomela ha mocheso, ho netefatsa hore boto e lula e bataletse.

Liphoso Tse Tloaelehileng Tsa ho Qoba ho Flex PCB Soldering

Esita le litsebi tse nang le phihlelo li ka oela liphoso tse tloaelehileng tsa soldering. Mona ke tse ling tsa maraba tseo u lokelang ho li ela hloko:

Phoso ea 1: Ho Khetha Substrate e Fosahetseng ea PI

Ho khetha substrate e sa lokelang ho ka lebisa ho warping ka mor'a lipotoloho tse ngata tsa reflow. Mohlala, ho sebelisa substrate e tloaelehileng ea PI e nang le Coefficient of Thermal Expansion (CTE) ea 35ppm/°C ho ka fella ka ntoa e kholo, athe substrate ea PI e fetotsoeng e nang le CTE ea 18ppm/°C e tla fana ka litholoana tse ntle haholo.

Tharollo: Khetha di-substrate tse nang le mamello ya mocheso wa ≥280°C le matla a ho hlohlora >1.2N/mm.

Phoso ea 2: Litlhophiso tse Fosahetseng tsa Boemo ba Mocheso

Litefiso tse feteletseng tsa ho futhumatsa nakong ea soldering li ka baka delamination ea filimi ea sekoahelo. Ho bohlokoa ho sebelisa mothipa o matla oa RTS (Ramp-to-Soak) ho fapana le mokhoa o tloaelehileng oa Ramp-Soak ho netefatsa hore butle-butle o futhumatsa.

Tharollo: Netefatsa puseletso e nepahetseng ea mocheso oa ±5°C libakeng tse bohlokoa ho qoba ho arohana ha mocheso.

Phoso ea 3: Moqapi o Fosahetseng oa Stencil

Liphoso tsa moralo oa ho bula li-stencil li ka lebisa ho thehoeng ha manonyeletso a solder le mefokolo. Ho ntlafatsa boholo ba ho bula li-stencil ho bohlokoa bakeng sa ho fumana manonyeletso a boleng bo holimo.

Tharollo: Sebelisa maano a moralo a kang ho fokotseha ha 10% ka hare ho likarolo tsa 0201 le masoba a matrix bakeng sa lisebelisoa tsa QFN ho fokotsa liphoso haholo.

Phoso ea 4: Ho hlokomoloha Tšireletso ea Khatello ea Mechanical

Ho tsamaisa PCB kapele ka mor'a ho soasoa ho ka lebisa ho mapetsong a manyane le ho robeha ha conductor. Sena ke 'nete haholo-holo haeba PCB e feto-fetoha kapa e tlas'a khatello ea mochine.

Tharollo: Sebelisa lisebelisoa tsa makenete le li-gel tse tšehetsang tse entsoeng esale pele ho boloka botsitso ba sebopeho sa PCB nakong ea kopano.

Phoso ea 5: Ho Sebelisa Mekhatlo e Fosahetseng ea ho Hloekisa

Ho sebelisa lisebelisoa tse sa lokelang ho hloekisa, joalo ka joala, ho ka siea masala a kotsi ho PCB a ka amang ts'ebetso.

Tharollo: Sebelisa litharollo tse khethehileng tsa ho hloekisa ho fokotsa tšilafalo ea ionic le ho netefatsa hore PCB e fihlela maemo a indasteri bakeng sa bohloeki.

Litharollo tse tsoetseng pele le Mehlala ea Taolo ea Ts'ebetso

Bakeng sa ba batlang ho tebisa tsebo ea bona ea tekheniki, ho kenyelletsa litharollo tse tsoetseng pele le mefuta ea taolo ea ts'ebetso ho ka thusa ho ntlafatsa sephetho sa thekiso.

Mohlala oa Taolo ea Fensetere ea Nako ea Mocheso: Fetola liprofaele tsa mocheso ho latela botenya ba PCB ho netefatsa ho kopanngoa ha metsi hape hantle. Mohlala:

def optimal_profile(botenya):
haeba botenya <= 0.1mm:
    return {“preheat”:”90-120℃/60s”, “soak”:”150-180℃/90s”, “peak”:”235±3℃”}
ho seng joalo:
    return {“preheat”:”80-110℃/75s”, “soak”:”140-170℃/110s”, “peak”:”230±3℃”}

Moetso ona o thusa ho lokisa tšebetso ea solder bakeng sa liphetho tse ntle, haholo bakeng sa liboto tsa botenya bo fapaneng.

Karolelano ea Khauta ea Moralo oa Pad: Netefatsa hore bolelele ba pad bo feta bolelele ba karolo ka makhetlo a 1.2, 'me bophara e le bophara ba terminal + 0.1mm. Karolelano ena e netefatsa sebopeho se tšepahalang sa solder.

Meeli ea Ts'ebetso e Bocha:

• Tekanyo ea Mocheso: ≤300 ° C (Kotsi ea tšenyo e ka holimo ho 320 ° C)
• Kopana le Khatello: ≤0.5N/mm² (Kotsi e ka holimo ho 0.8N)
• Lipotoloho tsa ho futhumatsa: ≤3 li-cycle (Kotsi ea tšenyo e ka holimo ho li-cycle tse 5)

Ho utloisisa le ho khomarela meeli ena ho tla thibela tšenyo nakong ea rework le ho boloka botšepehi bo kopanetsoeng ba solder.

Litharollo tse Khethehileng bakeng sa Flex PCB Soldering

Ho sebetsana le liphephetso tse ikhethileng ho flex PCB soldering, mekhoa e ikhethileng e kang dynamic Coefficient of Thermal Expansion (CTE) e bapisang, litsamaiso tsa ho bolela esale pele sekoli, le tharollo ea mocheso o tlase oa mocheso lia fumaneha. Litheknoloji tsena li thusa ho fokotsa khatello ea mocheso, ho bolela esale pele litaba tse ka bang teng tsa soldering, le ho netefatsa ts'ebetso e phahameng ea maqhubu.

Theknoloji ea ho Kopanya CTE e Matla: Ka ho bapisa CTE ea substrate le likarolo, kotsi ea khatello ea mocheso nakong ea ho kopanya e fokotseha.

Sistimi ea ho Bolela Liphoso ka ho Kopanya: Litsamaiso tse tsoetseng pele li ka bolela esale pele liphoso tse ka bang teng ho latela lifaele tsa moralo oa PCB, e leng se lumellang tharollo ea bothata pele ts'ebetso ea ho kopanya e qala.

Mekhoa e Khethehileng:

• Li-PCB tsa Just-Flex: Sebelisa li-curve tsa mocheso oa stepwise bakeng sa ho kopanya hantle.
• Ultra-Thin FPCs: Sekhahla sa solder sa Sn-Bi se nang le mocheso o tlase se thibela tšenyo e bakoang ke mocheso o feteletseng.
• Liboto tsa Maqhubu a Phahameng: Tšireletso ea sekoti sa silevera e tiisa botšepehi ba pontšo.

fihlela qeto e

Soldering flex PCBs hloka tlhokomelo e hlokolosi ho lintlha le kutloisiso e phethahetseng ea lisebelisoa le lits'ebetso tse amehang. Ka ho latela lintlha tsena tsa bohlokoa, ho qoba liphoso tse tloaelehileng, le ho kenya ts'ebetsong mekhoa e tsoetseng pele, u ka finyella boleng ba boleng bo phahameng, bo ka tšeptjoang ba lisebelisoa tsa solder bakeng sa lipotoloho tse bonolo tse hatisitsoeng. Hore na o sebetsana le liboto tsa maqhubu a phahameng kapa li-PCB tse tšesaane haholo, ho netefatsa maemo a nepahetseng bakeng sa mohato o mong le o mong oa solder ho tla fella ka ts'ebetso e tšoarellang le e sebetsang hantle.