Solder Mask Bridge e Bolela'ng 'me U ka e Thibela Joang?

Borokho ba mask a solder ke eng?

Borokho ba mask a solder bo bolela khokahano e sa reroang kapa tsoelopele ea lisebelisoa tsa maske tsa solder lipakeng tsa likarolo tse peli tse haufi tsa conductive kapa li-pads ho PCB. Mask ea solder ke lera le sireletsang le sebelisitsoeng holim'a mesaletsa ea koporo le liphaephe ho PCB ho thibela solder hore e se ke ea phalla moo e sa rereloang nakong ea ts'ebetso ea solder.

Nakong ea ho etsoa ha PCB, mask a solder hangata a sebelisoa ho koahela bokaholimo bohle, ho siea menyetla kapa "lifensetere" feela moo lipampiri tsa solder kapa mesaletsa ea koporo e pepesitsoeng e leng teng. Leha ho le joalo, maemong a mang, ka lebaka la liphoso tsa tlhahiso kapa mathata a moralo, mask a solder a ka fetela ka nģ'ane ho sebaka se reriloeng 'me a theha borokho kapa khokahano lipakeng tsa lipampiri tse haufi kapa mesaletsa.

Marokho a mask a solder a ka baka lipotoloho tse khuts'oane kapa tšitiso lipakeng tsa likarolo tsa boahelani tse tsamaisang, tse lebisang ho se sebetseng ha motlakase kapa ho hloleha ho potoloha. E ka ba bothata, haholo-holo ka meralo e nang le sets'oants'o se phahameng moo sebaka se pakeng tsa li-pads kapa mesaletsa se fokolang haholo.

Ho thibela marokho a mask a solder, litataiso tse nepahetseng tsa moralo, lits'ebetso tsa tlhahiso, le mehato ea taolo ea boleng e lokela ho lateloa. Baqapi ba lokela ho etsa bonnete ba hore ho na le sebaka se lekaneng pakeng tsa lipampiri tse haufi, ho sebelisa liphallelo tse nepahetseng tsa solder kapa litekanyetso tsa ho atolosa, le ho etsa tlhahlobo le tlhahlobo e phethahetseng nakong ea tlhahiso ea PCB ho bona le ho lokisa mathata leha e le afe a ka bang teng a ho koala mask.

PCB ea hau e angoa joang ke ts'ebetso ea masking ea solder

Ts'ebetso ea masking ea solder e bapala karolo ea bohlokoa ho thehoeng le ts'ebetsong ea liboto tsa potoloho tse hatisitsoeng (PCBs). Mona ke kamoo ts'ebetso ea masking ea solder e ama PCB ea hau:

1. E thibela Borokho ba Mask ea Solder: E 'ngoe ea mesebetsi ea mantlha ea mask a solder ke ho thibela marokho a mask a solder. E theha mokoallo kapa "letamo la solder" pakeng tsa manonyeletso a solder le libaka tse ling tse tsamaisang boto. Sena se thibela likhokahano tse sa lebelloang lipakeng tsa likarolo tsa conductive, tse ka lebisang ho senyeha ha boto kapa li-circuits tse khutšoane. Solder mask marokho ke taba e tloaelehileng nakong ea kopano ea PCB, 'me mask a solder a thusa ho fokotsa bothata bona.
2. E fokotsa Tšebeliso ea Solder Paste: Solder paste e sebelisoa nakong ea ts'ebetso ea solder ho theha likhokahano tsa motlakase. Mask ea solder e fokotsa tlhoko ea peista e feteletseng ka ho fana ka insulation lipakeng tsa likarolo tsa boto. Sena ha se boloke litšenyehelo tsa thepa feela empa hape se thusa ho thibela mefokolo e amanang le solder.
3. E sireletsa PCB: Mask ea solder e sebetsa e le lera le sireletsang le sireletsang PCB ho litšila tse ka hlahisoang nakong ea ho tšoara kapa ho kopanya. E sebetsa e le tšitiso, e thibelang lerōle, litšila, mongobo le lintho tse ling tse silafatsang hore li se ke tsa kopana le lintho tse tsamaisang boto. Tšireletso ena e ka eketsa nako ea bophelo ea ts'ebetso ea sesebelisoa.
4. E Eketsa Voltage e Senyehileng: Thepa ea dielectric e sebelisoang ho li-PCB e na le voltage ea ho senyeha, e leng matla a phahameng ao e ka a mamellang pele arcing ea motlakase e etsahala. Ka ho sebelisa mask a solder, o ka ntlafatsa matla a ho senyeha ha PCB. Sena ke sa bohlokoa haholo bakeng sa mapolanka a matla a phahameng (ho feta 1 kV), kaha se fana ka tšireletso e eketsehileng khahlanong le ho tsoa ha corona le li-arcs tsa motlakase.
5. E thibela ho etsoa ha Metal Whisker: Litelu tsa tšepe ke lintho tse nyenyane, tse kang moriri tse ka melang holim'a litšepe tse itseng, ho akarelletsa le thini. Li ka baka lifupi tsa motlakase le mathata a mang likarolong tsa elektronike. Mask ea solder e thusa ho thibela ho hlaha ha litelu tsa thini, haholo-holo ka likarolo tse nang le solder e se nang loto le tin plating. Ka ho sebetsa e le tšitiso, mask a solder a fokotsa kotsi ea ho thehoa ha whisker.

Ka kakaretso, ts'ebetso ea masking ea solder e bohlokoa bakeng sa ho netefatsa ts'epo le ts'ebetso ea li-PCB. E sebetsana le mathata a fapaneng, ho kenyelletsa ho thibela marokho a mask a solder, ho fokotsa tšebeliso ea solder paste, ho sireletsa PCB ho litšila, ho matlafatsa motlakase oa ho senyeha, le ho fokotsa kotsi ea ho etsoa ha whisker ea tšepe. Leha ho ka 'na ha e-ba le maemo ao mask a solder a sa khoneheng, ka kakaretso ke mohato o boima oa ho etsa PCB ho netefatsa ts'ebetso le bophelo bo bolelele ba lisebelisoa tsa elektroniki. Ho buisana le moetsi oa hau oa PCB (CM) ho bohlokoa ho lekola litlhoko le litlamorao tsa ts'ebeliso ea mask ea solder bakeng sa moralo oa hau oa PCB.

Litaba Tse Tsejoang Tse Tloaelehileng tsa Soldering Bridging

Ho koala borokho nakong ea solder ho ka lebisa litabeng tse 'maloa tse tsebahalang, ho kenyelletsa:

Ho Ntša Mongobo le ho se Kolobise: Ho ntšoa ha metsi ho etsahala ha solder e qhibilihisitsoeng e qala ho koahela pad empa ebe e khutlela morao, e siea tutulu ea solder. Ka lehlakoreng le leng, ho se ntšoe ha metsi ho etsahala ha solder e qhibilihisitsoeng e sa kolobise koporo e pepeneneng hantle pad. Mathata ana a ka hlaha ka lebaka la ho se phuthe hantle ha likarolo tsa koporo kapa tlhoko ea ho fetola phallo.

Masoba a Pin le Masoba a Blow: Masoba a Pin le masoba a blow ke diphoso tse hlahang ha ho na le plating e mpe ya koporo kapa mongobo o feteletseng botong. Masoba a Pin ke masoba a manyane kapa dikgeo tse ka hara solder joint, ha masoba a blow e le masoba a maholo kapa dikgeo tse bakwang ke mongobo kapa dikhase tse tshwasehileng.

Li-Pad tse Phahamisitsoeng: Li-pad tse phahamisitsoeng li etsahala ha karolo e kopantsoeng e tlosoa 'me bokaholimo ba ho kopanya bo na le plating ea koporo e tsofetseng kapa e sa lekanang. Sena se ka fella ka hore li-pad li arohane le PCB, e leng se bakang mathata a khokahano ea motlakase.

Lejoe la lebitla: Ho betla lebitla ho etsahala nakong ea ho betla lebitla ha karolo e phahamisoa 'me e ema e otlolohile, e tšoana le lejoe la lebitla. Ho ka bakoa ke ho sebelisa likarolo tse nang le litšobotsi tse fapaneng tsa ho betla kapa ho sebelisa li-lead tse bolelele bo fosahetseng.

Ho Selitha ho Feteletseng: Ho bokellana ho feteletseng ha solder ho ka hlaha ka lebaka la mabaka a kang boholo bo sa lokelang ba lead ha ho bapisoa le karolelano ea pad kapa motsamao o potlakileng oa lebanta la conveyor nakong ea ts'ebetso ea ho selitha. Sena se ka lebisa marokhong a solder le boleng bo bobe ba manonyeletso a solder.

Litaba tsena li ka ama ts'ebetso, ts'epahalo le ts'ebetso ea likhokahano tse rekisoang ho PCB. Ho fokotsa mathata ana, ke habohlokoa ho latela mekhoa e nepahetseng ea ho kopanya, ho etsa bonnete ba hore ho na le plating e lekaneng le bohloeki ba boto, le ho sebelisa likarolo tse lumellanang le mokhoa oa ho kopanya. Ho feta moo, mehato ea tlhahlobo le taolo ea boleng e lokela ho kengoa ts'ebetsong ho bona le ho rarolla mathata afe kapa afe a ho rekisa pele PCB e sebelisoa lisebelisoa tsa elektroniki.

Seo U Lokelang ho se Etsa ho Qoba marokho a Solder Mask?

Ho qoba marokho a maske a solder kopanong ea hau ea PCB , o ka latela sete ea mehato ea ho itšireletsa le mekhoa e metle nakong eohle ea meralo, tlhahiso le ts'ebetso ea kopano. Mehato ea bohlokoa ea ho thibela marokho a maske a solder ke ena:

1. Netefatsa Moralo oa PCB: Hlahloba moralo oa hau oa PCB ka hloko ho etsa bonnete ba hore o kopana le mekhoa e metle ea ho etsoa, ​​​​haholo-holo bakeng sa likarolo tsa holim'a metsi le ka masoba. Ho latela maemo a indasteri joalo ka a hlalosoang ke IPC (Institute for Printed Circuits) ho ka thusa ho netefatsa moralo oa boleng bo holimo.
2. Melao ea Moralo bakeng sa Thuso ea Mask: Sheba melao ea moralo bakeng sa liphallelo tsa mask, haholo-holo libakeng tseo ho sa hlokahaleng ho sebelisa mask a solder. Beha litekanyetso tsa liphallelo ho litekanyo tse loketseng, hangata lipakeng tsa 0.003 ho isa ho 0.008 inches bakeng sa likarolo tsa SMT (Surface Mount Technology). Fetola litekanyetso tsena ha ho hlokahala, haholo ha u sebetsa ka li-pads tse arohaneng haholo.
3. Alter Reflow Profile: Fetola profil ea reflow nakong ea ts'ebetso ea soldering. Lelefatsa nako ka mocheso feela ka holim'a ntlha ea ho qhibiliha ea solder ho lumella li-pads le karolo e lebisang ho fihlela mocheso o lakatsehang butle-butle. Ho futhumatsa hona butle-butle ho khothalletsa ho koloba le ho khomarela hantle ntle le ho etsa marokho a solder.
4. Sebelisa Matamo a Mask a Solder: Kenya ts'ebetsong matamo a mask a solder lipakeng tsa SMT pads. Matamo ana a sebetsa e le marako a ho itšehla thajana ho thibela solder ho hasana ka nģ'ane ho libaka tse reriloeng. Netefatsa hore bonyane boholo ba letamo bo lekane, hangata bo ka bang 0.004 inches. Fetola boholo bona ho latela litlhoko tse khethehileng tsa moralo.
5. Nahana ka Bolelele ba Moeta-pele bakeng sa Likarolo tsa Ka-Hole: Bakeng sa likarolo tsa ka-hole, nahana ka bolelele bo loketseng ba pele. Lintlha tse kang botenya ba boto, boholo ba likarolo, le mokhoa oa ho kopanya li ka ama bolelele ba loto e hlokahalang. Buisana le moetsi oa hau oa PCB ho fumana hore na bolelele bo nepahetseng ke bofe ho qoba borokho.
6. Fokotsa Bolumo ba Solder Paste: Tšebeliso e feteletseng ea solder paste e ka lebisa ho marokho a mask a solder. Fokotsa molumo oa peista ea solder e sebelisoang ho boto kapa fetola moralo oa stencil ho laola sebaka sa kopo ea peista, haholo-holo libakeng tse nang le sebaka se senyenyane pakeng tsa likarolo.
7. Sebelisa Liphaephe tse Khethiloeng tsa Mask ea Solder: Libakeng tse thata kapa tse phephetsang moo matamo a mask a solder a sa khoneheng, o ka sebelisa liphaephe tse hlalositsoeng ka mask ho sireletsa bokaholimo ba solder. Mokhoa ona o thusa ho thibela marokho a mask a solder libakeng tse koaletsoeng.
8. Pad Diameter e nepahetseng le boholo ba lesoba: Netefatsa hore o sebelisa bophara bo loketseng ba pad le boholo ba lesoba moralong oa hau oa PCB. Lisebelisoa tse kholo tsa koporo kapa ka masoba pakeng tsa libaka tse haufi-ufi li eketsa kotsi ea marokho a solder mask.
9. Sebelisa Masking ea Solder hantle: Tšebeliso ea mask a solder ke ea bohlokoa. Etsa bonnete ba hore mask a solder a sebelisoa libakeng tseo ho sa hlokahaleng ho kopanya. Lisebelisoa tsa mask a solder, tseo hangata li thehiloeng ho epoxy, li thibela solder e qhibilihisitsoeng ho li khomarela, e thusa ho thibela marokho a solder mask.
10. Sebelisa Fiducials: Kenyelletsa matšoao a fiducial moralong oa hau oa PCB. Li-fiducials tsena li thusa ho beha likarolo tse ikemetseng le ho hokahanya nakong ea kopano. Ho beha likarolo tse nepahetseng ho fokotsa menyetla ea likarolo tse sa lumellaneng tse ka lebisang ho marokho a mask a solder.
11. Sebelisana 'moho le Moetsi oa PCB ea Hlomphehang: Kopana le moetsi oa PCB ea nang le boiphihlelo le ea tsebahalang. Hlalosa litlhoko tsa hau tsa moralo, ho kenyelletsa le tlhoko ea ho thibela marokho a mask a solder, 'me u sebetse haufi-ufi le moetsi ho netefatsa hore mekhoa e metle e lateloa nakong eohle ea ts'ebetso ea ho etsa le ho kopanya.

Ka ho latela litemoso tsena le ho sebetsa 'moho le moetsi oa hau oa PCB, o ka fokotsa haholo kotsi ea marokho a mask a solder le ho netefatsa boleng le ts'epahalo ea likopano tsa hau tsa PCB.

U ka lokisa marokho a mask a Solder joang

Ho lokisa marokho a mask a solder ke ts'ebetso e bobebe e hlokang ts'ebeliso ea lisebelisoa le mekhoa e nepahetseng. Mona ke kamoo o ka lokisang marokho a mask a solder mohato ka mohato:

Lisebelisoa le Lisebelisoa tse Hlokahalang:

• Tšepe ea soldering e nang le ntlha e ntle le taolo e feto-fetohang ea mocheso
• Wick ea solder (braid e qhekellang)
• Solder flux
• Multimeter (ea boikhethelo, bakeng sa tlhahlobo)
• Seponche se metsi kapa lesela le mongobo (bakeng sa ho hloekisa ntlha ea tšepe ea solder)

Tsamaiso:

1. Lokisetsa Tšepe ea Hao ea Soldering: Beha mocheso oa tšepe ea hau ho boleng bo loketseng, hangata ho pota 150-250 ° C (300-480 ° F), ho itšetlehile ka solder le likarolo tse sebelisitsoeng. Lumella tšepe ho fihlela mocheso ona ka botlalo pele o tsoela pele.
2. Monitor Mocheso: Netefatsa hore ntlha ea tšepe ea solder e fihla mocheso o hlokahalang bakeng sa ho soasoa. U ka 'na ua hloka ho eketsa mocheso ka likhato tse' maloa ho ikarabella bakeng sa ho kenngoa ha mocheso ka mohala oa solder nakong ea ts'ebetso ea ho lokisa. Ka mohlala, haeba o soldering ka 250 ° C, o ka beha tšepe ho 270 ° C.
3. Sebelisa Surface Tension: Maemong a mang, o ka sebelisa tsitsipano e kaholimo ea solder e entsoeng ka ho qhibilihisoa ho koala borokho ba maske a solder ntle le tlhoko ea khoele. Ho etsa sena, ka bonolo ama borokho ba solder ka ntlha ea tšepe ea soldering. Khatello ea holim'a metsi e lokela ho hula solder e feteletseng ho tloha sebakeng sa borokho. Ela hloko hore u se ke ua chesa PCB kapa likarolo tse ling.
4. Sebelisa Wick ea Solder: Haeba ho sebelisa tsitsipano ea holim'a metsi feela ho sa tlose borokho, u ka tsoela pele ka ho sebelisa khoele ea solder (desolder braid). Mokhoa oa ho e etsa ke ona:
   • Sebelisa palo e nyane ea solder flux ho borokho ba mask a solder. Sena se tla thusa ho phalla ha solder le ho monya.
   • Beha khoele ea solder ka ho toba holim'a borokho, ho netefatsa hore e koahela sebaka sohle se borokho.
   • Beha ntlha ea tšepe ea soldering holim'a mohala, u sebelise khatello e bonolo ho fetisetsa mocheso.
   • Mocheso o tla etsa hore solder e borokhong e qhibilihe ebe e kenngoa ka har'a khoele. Tsamaisa tšepe butle ho koahela sebaka sohle sa borokho.
5. Fetola Wick e Koetsoeng (haeba ho hlokahala): Haeba khoele ea solder e koalehile ka solder e nkiloeng, e nkele sebaka ka karolo e ncha ho tsoela pele ka ts'ebetso ka katleho.
6. Hloekisa Tlhahiso ea Tšepe ea Soldering: Nako le nako, hloekisa ntlha ea tšepe ea soldering ka ho e hlakola ka seponche se metsi kapa lesela le mongobo. Keletso e hloekileng e netefatsa phetisetso e ntle ea mocheso nakong ea tokiso.
7. Hlahloba Tokiso: Ka mor'a ho tlosa borokho ba mask a solder, hlahloba sebaka seo ho netefatsa hore se hloekile ebile ha se na marokho a solder. U kanna ua batla ho etsa liteko tsa ho tsoela pele lipakeng tsa lintlha tse kentsoeng pele u sebelisa multimeter ka mokhoa oa ho tsoela pele.
8. Sebelisa hape Solder (haeba ho hlokahala): Haeba ho tlosa borokho ho fella ka ho tlosoa ha motsoako oa solder, sebelisa solder e eketsehileng ho tsosolosa khokahano e hloekileng le e tiileng ea solder pakeng tsa likaroloana.

Hopola ho ba hlokolosi le ho nepahala nakong ea ts'ebetso ea tokiso ea borokho ba solder ho qoba ho senya PCB kapa likaroloana. Haeba u sa itšepe ka tsebo ea hau ea ho rekisa, nahana ka ho batla thuso ho setsebi se nang le tsebo kapa tšebeletso ea ho lokisa lisebelisoa tsa elektronike.

bofello

Ka kakaretso, marokho a maske a solder a ka ba kotsi ho diboto tsa potoloho ka lebaka la kgonahalo ya ho roala dikgutshwane tsa motlakase. Ho bohlokwa ho latela mehato ya thibelo e boletsweng pejana ho qoba ho hlaha ha tsona. Leha ho le jwalo, haeba marokho a maske a solder a etsahala, ho a hlokahala ho a rarolla kapele. Sena se ka kenyeletsa ho hlahloba ka hloko dibaka tse amehileng, ho tlosa solder e feteletseng ho sebedisa disebediswa tse loketseng jwalo ka wick ya solder kapa solder sucker, le ho netefatsa hore solder joint e ntse e phalla hantle kapa e sebetsa botjha. Haeba ho hlokahala, ho buisana le setsebi se nang le boiphihlelo kapa moetsi wa PCB ho ka fana ka tataiso le thuso ho rarolleng mathata a borokho ba maske a solder ka katleho. Ka ho nka kgato ka potlako, o ka fokotsa tshusumetso e mpe e ka bang teng ya marokho a maske a solder dibotong tsa hao tsa potoloho.