Cov Motherboards Khoom Siv Hluav Taws Xob Rau Cov Neeg Siv Khoom Xav Tau Ob Lub Taub Hau Pin Txheem thiab High-Density - 2.54mm thiab 1.27mm Kev Teeb tsa rau PCB Assembly Houses

Vim Li Cas Cov Khoom Siv Hluav Taws Xob Niaj Hnub Xav Tau Ob Lub Pin Header Densities

Thaum peb tshuaj xyuas cov qauv motherboard ntawm cov khoom siv hluav taws xob niaj hnub no - los ntawm cov chaw hauv tsev ntse thiab IoT gateways mus rau cov khoom siv ua si thiab cov khoom siv kho mob nqa tau - ib qho qauv meej tshwm sim. Cov neeg tsim qauv tsis xaiv ntawm cov khoom sib txuas txheem thiab cov khoom sib txuas siab; lawv siv ob qho tib si ntawm tib lub PCB. Txoj hauv kev dual-pitch no tau dhau los ua tus qauv tsim rau txhua lub rooj tsavxwm uas yuav tsum sib npaug kev siv nyiaj nrog cov yam ntxwv me me.

Lub zog tsav tsheb tom qab qhov sib txawv no yog qhov yooj yim. Thaum cov yam ntxwv teeb tsa nthuav dav thiab cov ntawv cog lus ntawm cov ntawv cog lus, txhua square millimeter ntawm PCB thaj av nqa tus nqi. Lub taub hau pin 2.54mm siv kwv yees li plaub npaug ntawm thaj chaw ntawm lub rooj tsavxwm ntawm 1.27mm sib npaug rau tib tus lej pin. Txawm li cas los xij, tus qauv 2.54mm tseem nyob vim nws muaj kev ruaj khov kho tshuab, kev ua haujlwm yooj yim ntawm tes, kev sib raug zoo ntawm cov cuab yeej thoob ntiaj teb, thiab kev ntseeg siab mus sij hawm ntev hauv kev xa hluav taws xob thiab kev sib txuas lus tswj hwm qis.

Tib lub sijhawm, kev nthuav dav ntawm cov khoom siv sib txuas lus ceev ceev xws li MIPI, LVDS, thiab USB 3.x ntawm cov laug cam xav tau qhov sib nrug ntawm tus pin kom tswj tau qhov impedance thiab txo qhov ntev ntawm cov stub. Lub taub hau pin pitch 1.27mm teb rau qhov xav tau no, muab kev sib txuas me me uas txhawb nqa cov kev cai ntawm lub teeb liab thaum tseem sib xws nrog cov txheej txheem sib dhos SMT tus qauv. Peb tau pom qhov nce ntxiv ntawm qhov sib piv ntawm 1.27mm connectors hauv cov nqi ntawm cov ntaub ntawv uas peb tau txais los ntawm peb cov neeg siv khoom hauv tsev sib dhos dhau peb xyoos dhau los, thiab peb xav tias qhov sib txawv ntawd yuav txuas ntxiv mus.

Yog li ntawd, kev nkag siab txog yuav ua li cas thiaj li teev tau, nrhiav tau, thiab sib sau ua ke ob lub tsev neeg txuas yog qhov tseem ceeb rau txhua lub tsev sib dhos PCB uas ua haujlwm rau cov khoom siv hluav taws xob. Hauv phau ntawv qhia no, peb taug kev los ntawm cov yam ntxwv ntawm txhua qhov chaw, piav qhia txog cov tswv yim tsim khoom thiab kev yuav khoom, thiab qhia cov kev tswj hwm zoo uas peb siv hauv peb tus kheej tsim khoom kom ntseeg tau tias txhua lub taub hau pin uas peb xa khoom ua tau raws li cov qauv ntawm cov kab xaiv thiab tso tsis siv neeg.

Tus Qauv 2.54mm: Workhorse ntawm PCB Interconnections

Lub taub hau pin 2.54mm (0.100-nti) yog qhov siv ntau tshaj plaws ntawm lub rooj tsavxwm thiab lub rooj tsavxwm rau hlau hauv kev lag luam hluav taws xob. Nws keeb kwm rov qab mus rau hnub thaum ntxov ntawm kev tsim khoom PCB los ntawm qhov, thiab txawm hais tias muaj ntau xyoo dhau los hloov mus rau kev siv tshuab surface-mount, lub suab 2.54mm tsis yog tsuas yog muaj sia nyob tab sis vam meej. Peb tsim ntau lab lub taub hau pin 2.54mm txhua lub hlis hauv peb lub Hoobkas Ningbo, thiab kev thov tseem muaj zog thoob plaws txhua pawg khoom peb pabcuam.

Muaj ntau yam piav qhia txog qhov kev kav ntev ntawm lub suab no. Ua ntej, qhov sib nrug 2.54mm muab qhov dav dav ntawm cov pins sib ze, uas txhais tau tias kev tsim khoom dav dua. Cov tshuab ntxig tsis siv neeg tuaj yeem tso cov connectors no ntawm qhov ceev ceev nrog cov nqi qis heev, thiab txawm tias qhov chaw tso tes thaum lub sijhawm prototyping lossis rework yog qhov yooj yim. Qhov thib ob, qhov seem ntawm tus pin rau 2.54mm headers feem ntau yog 0.64mm square, muab txhua tus pin muaj zog heev thiab muaj peev xwm nqa tam sim no uas yooj yim tuav cov rails fais fab thiab lub hom phiaj I / O dav dav.

Hauv cov ntawv thov motherboard khoom siv hluav taws xob rau cov neeg siv khoom, peb ib txwm pom 2.54mm pin headers siv rau JTAG debug interfaces, SPI thiab I2C programming headers, kiv cua connectors, front-panel control signals, thiab auxiliary power distribution. Cov no yog cov interfaces uas qhov ceev ntawm lub teeb liab tsis hnyav heev (feem ntau qis dua 50 MHz), qhov ruaj khov ntawm lub tshuab yog qhov tseem ceeb, thiab lub peev xwm los txuas thiab txiav cov khoom siv kuaj lossis cables yog qhov yuav tsum tau tsim. Tus qauv kuj tau txais kev txhawb nqa dav dav ecosystem: yuav luag txhua tus neeg muab khoom txuas, lub tsev sib dhos cable, thiab cov cuab yeej tsim PCB muaj cov khoom sib xws 2.54mm thiab cov cim taw qhia.

Los ntawm lub qhov muag ntawm lub tsev sib dhos, qhov 2.54mm pitch muaj cov txiaj ntsig zoo ntawm cov txheej txheem. Cov qauv reflow solder zam txim, qhov kev pheej hmoo ntawm kev puas tsuaj tsawg vim yog qhov loj ntawm cov pin, thiab kev tshuaj xyuas pom tseeb vim tias qhov dav dua ua rau cov fillets solder yooj yim rau kev soj ntsuam. Thaum peb tham txog peb cov neeg siv khoom cov ntaub ntawv tso tawm nrog lawv, cov laug cam nrog feem ntau 2.54mm connectors qhia txog qhov tsis zoo-ib-lab-lub sijhawm qis dua li cov uas muaj cov kev xaiv siab. Cov ntaub ntawv kev ntseeg siab no yog vim li cas ntau tus neeg tsim qauv txhob txwm khaws lub zog thiab kev tswj interfaces ntawm 2.54mm grid txawm tias thaum lawv tsiv cov teeb liab mus rau cov suab zoo dua.

Qhov Kev Xaiv 1.27mm High-Density: Txuag Qhov Chaw thiab Kev Ncaj Ncees ntawm Lub Teeb Liab

Txawm hais tias lub suab 2.54 hli ua haujlwm zoo rau kev sib txuas lus dav dav, nws dhau los ua lub luag haujlwm thaum thaj chaw ntawm lub rooj tsavxwm tsis muaj thiab cov zaus teeb liab nce siab tshaj ob peb puas megahertz. Qhov no yog qhov uas lub taub hau 1.27 hli (0.050-nti) nkag mus rau hauv daim duab. Los ntawm kev txiav ib nrab ntawm qhov chaw nruab nrab ntawm tus pin, lub suab 1.27 hli tso cai rau cov neeg tsim qauv ntim kwv yees li plaub npaug ntawm qhov sib txuas ceev rau hauv tib lub rooj tsavxwm ntug lossis thaj chaw.

Qhov chaw txuag tau pom tseeb tam sim ntawd thaum peb piv qhov ntev ntawm qhov chaw ib sab. Lub taub hau 2x25 ntawm 2.54mm pitch ntev li 63.5mm; tib lub 50-pin configuration ntawm 1.27mm pitch tsuas yog xav tau 31.75mm xwb. Rau cov khoom siv me me - lub hais lus ntse, lub maub los hnav tau, lossis lub HMI kev lag luam me me - qhov sib txawv ntawd tuaj yeem yog qhov sib txawv ntawm kev haum tus qauv rau hauv lub thawv lossis xav tau kev tsim kho dua tshiab kim.

Tshaj li qhov chaw txuag tau, qhov 1.27mm pitch muab cov txiaj ntsig zoo ntawm lub teeb liab. Qhov ntev ntawm tus pin luv dua thiab kev sib txuas nruj dua ntawm cov pins sib ze txo qhov parasitic inductance, uas ua rau lub teeb liab zoo dua. Thaum peb ua haujlwm nrog cov neeg siv khoom tsim cov laug cam uas nqa LVDS cov teeb liab, MIPI lub koob yees duab interfaces, lossis USB 3.2 cov ntaub ntawv, lawv feem ntau xaiv 1.27mm pin headers rau cov kev tseem ceeb no. Qhov ntev ntawm tus pin txo qis kuj txo qhov kev pheej hmoo ntawm kev cuam tshuam stub, qhov kev txhawj xeeb uas dhau los ua qhov tseem ceeb saum toj no kwv yees li 400 MHz.

Nws yog ib qho tseem ceeb uas yuav tsum lees paub qhov kev pauv pauv. Lub suab 1.27 hli xav tau kev ua haujlwm nruj dua - kev sib koom ua ke yuav tsum tswj tau hauv 0.10 hli, thiab kev sib txuas ntawm tus pin yog kwv yees li ib nrab ntawm cov uas tso cai ntawm 2.54 hli. Cov kev cai tso qhov tseeb ntawm kev ua haujlwm tsis siv neeg nce ntxiv, thiab kev tshuaj xyuas X-ray lossis AOI yuav tsum tau ua kom paub tseeb tias qhov sib koom ua ke zoo hauv qab lub cev zoo. Peb daws cov teeb meem no los ntawm kev siv cov pwm stamping precision, kev tshuaj xyuas pom kev hauv kab ntawm peb lub hauv pem teb tsim khoom, thiab kev koom tes ze nrog peb cov neeg siv khoom cov pab pawg tsim khoom kom paub tseeb tias kev sib dhos ua ke ua ntej pib tsim khoom loj.

Cov Tswv Yim Tsim PCB Dual-Pitch rau Cov Tsev Sib Dhos

Kev tsim lub motherboard uas muaj ob qho tib si 2.54mm thiab 1.27mm pin headers yuav tsum tau npaj ua tib zoo kom tsis txhob muaj teeb meem ntau. Peb tau txhawb nqa ntau pua tus qauv tsim dual-pitch board tau ntau xyoo, thiab ntau qhov kev coj ua zoo tshaj plaws tau ua pov thawj lawv tus nqi tas li. Lub hauv paus ntsiab lus thawj zaug yog kev sib cais chaw. Peb pom zoo kom muab tag nrho cov 2.54mm connectors tso rau hauv ib cheeb tsam ntawm lub board thiab tag nrho 1.27mm connectors tso rau hauv ib cheeb tsam sib cais, zoo tagnrho raws ntug ntawm lub board sib txawv. Qhov kev sib cais no ua rau kev teeb tsa cov cuab yeej yooj yim dua thaum lub sijhawm sib dhos, txo qhov kev pheej hmoo ntawm kev hloov pauv qhov tsis raug, thiab ua rau kev tshuaj xyuas zoo dua.

Lub hauv paus ntsiab lus thib ob yog kev sib xws ntawm kev taw qhia. Txhua lub taub hau pin ntawm tib lub suab ntawm ib lub rooj tsavxwm yuav tsum sib koom tib qho kev taw qhia piv rau lub rooj tsavxwm lub ntsiab axis. Kev coj ua no txo ​​cov naj npawb ntawm kev hloov pauv feeder thiab kev tig nozzle uas lub tshuab pick-and-place xav tau, ncaj qha txhim kho lub sijhawm voj voog thiab txo cov kev ua yuam kev tso. Hauv peb qhov kev paub, cov rooj tsavxwm uas ua raws li cov lus cog tseg no ua tiav cov nqi tso 8 txog 12 feem pua ​​​​​​sai dua li cov uas muaj kev taw qhia sib xyaw.

Kev tswj cua sov thaum lub sijhawm rov ua dua tshiab yog lwm qhov tseem ceeb uas yuav tsum xav txog. Cov taub hau 2.54mm thiab 1.27mm muaj cov cua sov sib txawv, uas txhais tau tias lawv nqus thiab tso cua sov ntawm cov nqi sib txawv thaum lub sijhawm rov ua dua tshiab. Yog tias ob hom txuas tau muab tso rau ntawm tib lub rooj tsavxwm, cov qauv rov ua dua tshiab yuav tsum tau kho kom haum rau cov cua sov loj dua ntawm 2.54mm lub cev yam tsis muaj cua sov ntau dhau rau cov taub hau 1.27mm uas mos dua. Peb xav kom koj xaiv tus neeg muag khoom taub hau taub hau uas tuaj yeem muab cov lus qhia txog cov qauv cua sov raws li qhov tseeb ntawm cov taub hau taub hau thiab cov khoom siv uas tau txiav txim siab, uas yog ib yam dab tsi uas peb pab neeg ua haujlwm ib txwm muab rau cov neeg koom tes hauv tsev sib dhos.

Thaum kawg, xav txog cov theem depaneling thiab kev tuav. Cov connectors me me 1.27mm muaj kev puas tsuaj ntau dua los ntawm kev khoov ntawm lub rooj tsavxwm thaum lub sijhawm depanelization. Yog tias cov connectors 1.27mm nyob ze ntawm ntug ntawm lub rooj tsavxwm lossis raws cov tabs breakaway, cov khoom siv txhawb nqa ntxiv lossis kev hloov kho qhov tob V-score yuav tsim nyog. Peb qhia peb cov neeg siv khoom kom qhia lawv cov qauv panelization nrog peb thaum ntxov hauv cov txheej txheem tsim kom peb tuaj yeem cim cov chaw muaj kev pheej hmoo thiab qhia cov kev hloov kho qhov chaw ntawm lub connector ua ntej siv cov cuab yeej.

Cov Khoom Siv thiab Kev Xaiv Plating: Tin, Kub, thiab Selective Plating

Qhov kev xaiv cov khoom siv plating rau cov pin headers muaj feem cuam tshuam ncaj qha rau tus nqi, kev sib txuas, kev tiv thaiv kev sib cuag, thiab lub neej voj voog sib txuas. Rau cov ntawv thov motherboard hluav taws xob rau cov neeg siv khoom, peb muab peb qhov kev teeb tsa plating txheem, thiab kev nkag siab thaum twg yuav tsum teev txhua tus tuaj yeem txuag tau tus nqi yuav khoom ntau yam tsis muaj kev cuam tshuam rau qhov zoo ntawm cov khoom.

Kev siv tin plating yog qhov kev xaiv pheej yig tshaj plaws thiab yog qhov kev xaiv tseem ceeb rau cov khoom siv uas tsis tshua muaj nqi. Peb cov pin headers uas siv tin-plated siv cov xim matte-tin uas tuab li 3 txog 5 micrometers hla ib txheej nickel barrier. Matte tin yog qhov zoo dua li cov tin ci rau kev siv reflow soldering vim nws tsim cov intermetallic bonds uas txhim khu kev qha dua thiab tiv taus kev tsim tin-whisker. Rau cov interfaces uas pom tsawg dua 50 lub voj voog sib txuas thoob plaws lub neej khoom - uas npog feem ntau cov debug headers, programming interfaces, thiab kev sib txuas sab hauv ntawm lub rooj tsavxwm - tin plating yog qhov txaus thiab sawv cev rau tus nqi zoo tshaj plaws.

Kev siv kub plating rau saum nickel yog qhov tau teev tseg thaum xav tau kev ntseeg siab dua lossis kev ua haujlwm ntev dua. Peb siv ib txheej kub ntawm 0.76 txog 1.27 micrometers (30 txog 50 micro-inches) rau saum ib txheej nickel ntawm 1.27 txog 2.54 micrometers. Cov neeg sib cuag uas muaj kub plated tswj tau qhov kev tiv thaiv kev sib cuag ruaj khov txog 500 lossis ntau dua kev sib cuag thiab tiv taus oxidation thiab corrosion hauv cov chaw noo noo. Qhov no ua rau kub plating yog qhov kev xaiv txheem rau cov connectors sab nraud, kev sim thiab ntsuas interfaces, thiab txhua daim ntawv thov uas lub connector yuav zaum tsis sib txuas ntev ua ntej siv.

Kev xaiv plating sawv cev rau qhov chaw nruab nrab uas pheej yig dua. Hauv cov txheej txheem no, thaj chaw sib cuag ntawm tus pin tau txais qhov kub tiav thaum tus tw solder khaws cia qhov tiav tin. Txoj hauv kev no tsom mus rau kev nqis peev plating qhov twg nws tseem ceeb tshaj plaws - ntawm qhov sib txuas mating - thaum khaws cov nqi solderability qis. Peb pom kev xaiv plating tau teev tseg ntau ntxiv hauv cov khoom siv hluav taws xob nruab nrab, qhov twg kev cia siab ntawm cov khoom lag luam nce siab tab sis tus nqi ntawm cov khoom siv tseem nyob siab heev. Tag nrho peb cov txheej txheem plating ua raws li qhov ntev thiab kev ua tau zoo tau teev tseg hauv IEC 60603-2, xyuas kom meej tias muaj kev sib koom tes nrog cov txheej txheem txuas thoob ntiaj teb.

Kev Tswj Xyuas Zoo: Kev Sib Koom Tes, Lub Zog Khaws Cia Pin, thiab Kev Siv Tau Solderability

Kev tswj xyuas zoo hauv kev tsim cov pin header tsis yog xaiv tau - nws yog lub hauv paus uas cov nqi tsim khoom thiab qhov kawg ntawm cov khoom lag luam nyob ntawm seb. Peb tswj hwm cov txheej txheem tshuaj xyuas ntau theem uas suav nrog txhua qhov tseem ceeb los ntawm kev lees paub cov khoom siv raw mus txog rau kev ntim khoom kawg. Rau cov tsev sib dhos PCB uas ntsuas cov neeg muab khoom pin header, peb qhov ntsuas zoo tseem ceeb tshaj plaws los ntsuas yog coplanarity, pin retention force, thiab solderability.

Kev sib koom ua ke yog hais txog qib uas txhua tus pin hauv lub connector pw hauv tib lub dav hlau. Rau kev tso SMT tsis siv neeg, kev sib koom ua ke yuav tsum tau tswj hwm hauv 0.10mm rau 2.54mm pitch headers thiab hauv 0.08mm rau 1.27mm pitch headers. Yog tias kev sib koom ua ke tshaj qhov kev kam rau siab no, qee tus pin yuav tsis sib cuag zoo nrog cov tshuaj nplaum solder thaum lub sijhawm tso, ua rau qhib lossis txias solder pob qij txha tom qab reflow. Peb ntsuas kev sib koom ua ke ntawm txhua qhov ntau lawm siv cov khoom sib piv optical flat thiab muab cov ntaub ntawv nrog txhua qhov kev xa khoom.

Lub zog tuav tus pin — lub zog uas yuav tsum tau siv los rho tus pin tawm ntawm lub tsev insulator — yog qhov ntsuas ntawm kev ruaj khov ntawm lub tshuab. Rau 2.54mm pins, peb teev qhov tsawg kawg nkaus ntawm lub zog tuav ntawm 0.5 kgf; rau 1.27mm pins, qhov tsawg kawg nkaus yog 0.3 kgf, uas qhia txog thaj chaw me me ntawm kev cuam tshuam. Cov pins uas tsis ua tiav qhov kev sim lub zog tuav yuav raug tshem tawm thaum lub sijhawm tuav lub rooj tsavxwm, kev sim tsis siv neeg, lossis kev pabcuam hauv thaj chaw. Txhua qhov peb xa khoom raug kuaj xyuas kom paub tseeb tias ua raws li qhov tsawg kawg nkaus no.

Kev ntsuas qhov ua tau ntawm kev sib txuas yog raws li IPC-A-610 cov qauv lees txais. Peb ua qhov kev ntsuam xyuas qhov sib npaug ntawm cov dej thiab kev ntsuam xyuas qhov tob thiab saib ntawm cov qauv pins los ntawm txhua qhov kev tsim khoom kom paub tseeb tias qhov plating muab kev pabcuam solder sib xws, tsis muaj qhov khoob. Rau cov pins tin-plated, peb kuj ua qhov kev ntsuam xyuas kev laus sai ntawm qhov kub thiab txias siab thiab av noo kom paub meej tias muaj peev xwm solder tau ntev. Peb cov ntau yam ntawm cov khoom siv pin header yog tsim los rau cov qauv no, thiab peb txais tos cov neeg sab nraud tshuaj xyuas peb cov txheej txheem zoo txhua lub sijhawm.

Kev Xav Txog Kev Yuav Khoom Ntau Rau Cov Tsev Sib Dhos PCB

Kev yuav cov pin headers ntau ntau rau kev tsim khoom siv hluav taws xob rau cov neeg siv khoom suav nrog ntau dua li kev sib piv cov nqi ntawm ib qho khoom. Peb ua haujlwm nrog cov pab pawg neeg yuav khoom hauv tsev sib dhos kom ua kom zoo dua tag nrho cov nqi tsaws, thiab ntau yam ua rau sib txawv ntawm cov khoom siv pin header uas tswj hwm zoo thiab cov khoom siv teb tau sai.

Qhov kev xav thawj zaug yog kev sib koom ua ke. Kev nrhiav ob qho tib si 2.54mm thiab 1.27mm pin headers los ntawm ib lub chaw tsim khoom - piv rau kev faib cov ntim thoob plaws ntau tus neeg muag khoom - muab cov txiaj ntsig pom tseeb: cov ntaub ntawv zoo sib koom ua ke, ib qho chaw sib cuag rau kev hloov pauv engineering, kev xa khoom ua ke uas txo cov nqi thauj khoom, thiab kev sib tham muaj zog dua ntawm kev nqis peev ntau dua. Peb muab cov qauv nqi sib txawv uas muab khoom plig rau kev txiav txim sib koom ua ke thoob plaws cov tsev neeg suab thiab cov teeb tsa txuas.

Kev tswj lub sijhawm ua khoom yog qhov tseem ceeb thib ob. Cov qauv txheem 2.54mm xa tawm ntawm peb lub tsev rau khoom Ningbo hauv 3 txog 5 hnub ua haujlwm. Kev suav tus lej tshwj xeeb, kev plating tshwj xeeb, lossis 1.27mm variants yuav tsum tau 15 txog 25 hnub ua haujlwm nyob ntawm qhov ntim. Peb tswj hwm cov ntawv cog lus kev nyab xeeb nrog peb cov neeg siv khoom tsis tu ncua, khaws cov khoom seem uas tuaj yeem hu tawm sai sai kom them rau qhov nce ntxiv yam tsis muaj tus nqi ntawm cov khoom seem ntau dhau ntawm lub tsev sib dhos.

Cov ntaub ntawv pov thawj thiab kev ua raws li txoj cai yuav tsum tsis txhob raug saib tsis taus. Txhua qhov kev xa khoom loj uas peb xa tuaj muaj daim ntawv pov thawj ntawm kev ua raws li txoj cai, cov ntawv qhia txog kev tshuaj xyuas qhov ntev, cov txiaj ntsig ntawm kev sim plating-tuab, thiab cov lus tshaj tawm RoHS/REACH. Rau cov tsev sib dhos ua haujlwm rau cov lag luam tswj hwm xws li cov khoom siv kho mob lossis cov khoom siv hauv tsheb, peb tuaj yeem muab cov lus tshaj tawm cov khoom siv hauv hom ntawv IPC-1752 thiab txhawb nqa kev tshuaj xyuas Hoobkas raws li cov kev pab cuam tsim nyog rau cov neeg siv khoom. Kev tsim cov ntaub ntawv no thaum pib ntawm kev sib raug zoo nrog cov neeg muag khoom tshem tawm kev ncua sijhawm thaum lub sijhawm tshuaj xyuas tuaj thiab ua kom lub sijhawm tsim khoom sai dua rau cov qauv tshiab.

Cov Lus Nug Feem Ntau