Kugadzirisa PCB Td Yekutendeseka Circuit Board Manufacturing

Nhanganyaya yeTd Value muPCB

Kana zvasvika pakugadzira nekugadzira Printed Circuit Boards ( PCBs ), Decomposition Temperature (Td) chinhu chakakosha chinoita basa guru mukuona kuti kugadzirwa kwacho kwakarurama uye kuvimbika kwenguva refu kwechigadzirwa chekupedzisira. Zvichitaurwa zviri nyore, kukosha kweTd kunomiririra tembiricha iyo zvinhu zvePCB zvinotanga kuputsika kana kuora nemakemikari. Iyi tembiricha haisi kungori hunyanzvi chete - inotsanangura muganho wekupisa kupfuura iyo hunhu hwemuviri nehwemagetsi hwezvinhu zvinokanganiswa.

Kunzwisisa kukosha kweTd kunonyanya kukosha nekuti inozivisa sarudzo dzakakosha panguva dzese dhizaini uye matanho ekugadzira ePCB budiriro. Munguva yekugadzira, kunyanya mumatanho senge solder uye reflow, maPCB anoratidzirwa kune tembiricha yakakwira. Kana iyo Td yemidziyo yakadzikira, kupisa kwakanyanya kunogona kukonzera kuparara kwemakemikari, zvichitungamira kune akawanda matambudziko akadai se delamination, kushaya simba majoini ekutengesa, uye pakupedzisira kutadza kwechigadzirwa. Naizvozvo, kusarudza zvinhu zvine kukosha kweTd kwakakodzera kunovimbisa kuti PCB inokwanisa kumirisana nekushushikana kwekupisa kunosangana panguva yekugadzira uye, zvakatonyanya, muhupenyu hwayo hwese hwekushanda.

Mumaindasitiri anhasi anodaidzira - kubva kumotokari uye aerospace kuenda kunharembozha - uko maPCB anofanirwa kuita pasi pemamiriro ekupisa anopisa, kukosha kweTd inova metric yakakosha inogona kukanganisa zvakanyanya mashandiro, kuvimbika, uye hupenyu hwemagetsi emidziyo. Nekunyatsoongorora nekusarudza zvinhu zvinoenderana nehunhu hwavo hweTd, mainjiniya anogona kukwidziridza kuita kwePCB kuti asangane nezvinodiwa zvekupisa zvekushandisa kwavo, kuve nechokwadi chenguva refu uye yakavimbika zvemagetsi.

Kukosha kweTd Value muCircuit Board Manufacturing

Kugadzira Kufunga kwePamusoro-Kuita maPCB

Panguva yekugadzira PCB — kunyanya mumabasa akadai sekusoldering, reflow soldering, uye wave soldering — chinhu ichi chinofanira kutsungirira tembiricha yakakwira inowanzo bva pa220°C kusvika 250°C. Chinhu chePCB chine kukosha kweTd pamusoro pekupisa uku kwepamusoro-soro chinovimbisa kugadzikana kwekupisa uye chinodzivirira matambudziko akajairika akadai sekubvisa gasi, kubuda kwegasi, kana kusasimba kwemajoini esolder.

Semuenzaniso, mune yakakwira-frequency maPCB anoshandiswa mumidziyo yekufonera, kuchengetedza kuvimbika kwezvinhu panguva yekugadzira kwakakosha. High Td zvinhu zvinosarudzwa kuti zvitsungirire kukurumidza kupisa kutenderera kweyepamusoro-kumhanya solder maitiro pasina kukanganisa bhodhi mashandiro emagetsi kana chimiro chemuchina.

Kusarudza zvinhu zvine huwandu hweTd hunokosha hunopa vagadziri vebhodhi redunhu vane chivimbo chekuti PCB ichachengetedza kuvimbika kwayo panguva yekugadzira uye kushanda, kuderedza njodzi yekutadza kusati kwasvika.

Kuvandudza Kuita uye Kuvimbika kweMagetsi Devices

Td kukosha inoitawo basa rakakosha mukuvimbika kwenguva refu kwemidziyo yemagetsi. Mabhodhi edunhu anowanzo kuisirwa mhando dzakasiyana dzekushushikana kwezvakatipoteredza panguva yehupenyu hwavo hwekushanda, senge thermal cycling, mechanical vibration, uye kuratidzwa kune humidity. Zvishandiso zvine huwandu hwepamusoro Td zvakashongedzerwa zvirinani kubata aya mamiriro, kuchengetedza kuita kwePCB uye kuwedzera hupenyu hwechishandiso.

Mumashandisirwo akadai semagetsi emotokari, uko maPCB anofanirwa kumirisana nekupisa kwakanyanya munzvimbo dzakaita semakamuri einjini, kushandisa zvinhu zvine Td yakakosha inovimbisa kuti bhodhi rinoramba richishanda kunyangwe mamiriro akaomarara. Mumamiriro ezvinhu akadai, kukosha kweTd kunokanganisa kusimba uye Kurevesa Nguva Pakati Pekutadza (MTBF) yechishandiso, zvichiita kuti ive yakakosha kutsanangurwa kwepamusoro-kuvimbika mabhodhi edunhu.

Kuvandudza Td Kukosha muPCB Kugadzirwa

Kusarudza High-Performance PCB Zvishandiso

Kusarudzwa kwezvinhu zvine maitiro akakwirira eTd ndiyo imwe yenzira dzinoshanda dzekuona kugadzikana kwekupisa muPCBs. Zvishandiso zvakaita se polyimide, yakakwira-Tg FR-4, uye ceramic-based substrates zvinowanzo shandiswa mukugadzira bhodhi redunhu uko kupisa kwakanyanya kunotarisirwa. Semuenzaniso, polyimide laminates, inozivikanwa neTd yavo inodarika 400 ° C, inowanzoshandiswa mumhepo, mauto, uye yakakwirira-yakavimbika magetsi.

Munzvimbo dzekufonera uye dzekugadzirisa data, uko kutendeseka kwechiratidzo uye kugadzikana kwekudziya kwakakosha, zvinhu zvine Td yakakwira kukosha inovimbisa kuti bhodhi redunhu rinoita zvakanaka pasi pekuchinja kwekukurumidza kwemafuta, zvichiita kuti ive sarudzo yakasarudzika yevagadziri nevagadziri.

Kudzora Kugadzira Maparamita eZviri Nani Thermal Kugadzikana

Kunyangwe kana uchishandisa yakakwirira-Td zvinhu, kungwarira kutonga kwekugadzira paramita kwakakosha kuti uwedzere kugadzikana kwekupisa. Lamination paramita senge tembiricha, kudzvanywa, uye nguva inofanirwa kugadzirwa kuti isimbise kusungirirwa kwezvinhu uye kuwedzera kugona kwayo kutsungirira mitoro yakakwira yekupisa.

Kurapa kwepamusoro-soro, senge Electroless Nickel Immersion Gold ( ENIG ) uye Organic Solderability Preservative ( OSP ), kunogona kuchengetedza zvakanyanya pamusoro pebhodhi panguva yekusonera, zvichibatsira kuchengetedza kukosha kweTd yezvinhu uye kuramba kupisa kwese.

Kushandisa Additives Kuwedzera Td Value

Kubatanidza zvinowedzerwa senge flame retardants, brominated compounds, kana phosphate esters zvinogona kuvandudza kupisa kwekupisa kwezvinhu zvePCB, zvinobudirira kuwedzera kukosha kwavo kweTd. Nekudaro, kuwedzera aya makomisheni kunofanirwa kuve pakati nekufunga nezvekuita kwemagetsi uye kutendeseka kwechiratidzo, sezvo zvimwe zvekuwedzera zvinogona kukanganisa PCB's dielectric properties.

MumaPCB akakwira-frequency, kuve nechokwadi chekuti zvinhu zvinochengeta zvese zvakakwirira Td hunhu uye kuita kwakanakisa kwemagetsi kwakakosha kudzivirira kudzikisira mukufambiswa kwemasaini, izvo zvinogona kukanganisa kushanda kwemidziyo yenharembozha kana mamwe magetsi anonzwisa tsitsi.

Kushandisa Kurapa Kupisa Kwekuvandudza Td

Kurapa kupisa kunogona kushandiswa kuderedza kushushikana kwemukati mezvinhu zvePCB , kuvandudza kugadzikana kwazvo kwekupisa uye kuwedzera kukosha kwazvo kweTd. Nekushandisa nekungwarira maitiro ekudziyisa nekutonhodza panguva yekugadzira, vagadziri vePCB vanogona kuvandudza kupenya kwepolymer matrix muzvinhu, zvichikonzera hunhu huri nani hwekupisa uye hwemakanika. Zvisinei, kudzora kwakaringana kwemaitiro aya kwakakosha kudzivirira kupisa kwakanyanya, izvo zvinogona kukanganisa chinhu kana hunhu hwacho hwemagetsi.

Zvakajairwa PCB Zvishandiso uye Zvavo Td Values

MuPCB zvinhu, iyo Td (Decomposition Temperature) inosiyana zvichienderana nerudzi rwezvinhu. Heano mamwe chaiwo Td maitiro ezvakajairwa PCB zvinhu:

1. FR-4 (Yakajairika):
   • Td Range: 300 ° C kusvika 330 ° C
   • Iyi ndiyo inonyanya kushandiswa zvinhu kune general-chinangwa PCBs. Inopa kugadzikana kwekudziya kwemafuta mazhinji emagetsi ekutengesa.
2. High-Tg FR-4:
   • Td Range: 340 ° C kusvika 370 ° C
   • Yakakwira-Tg FR-4 zvinhu zvinoshandiswa mune zvakanyanya kudiwa maapplication uko kwakakwira kupisa uye kunetsa kwemakanika kuripo, senge mota kana maindasitiri maPCB.
3. Polyimide:
   • Td Range: 390 ° C kusvika 420 ° C
   • Polyimide ndeyepamusoro-inoshanda zvinhu izvo zvinowanzo shandiswa mune aerospace, mauto, uye yakakwirira-tembiricha maapplication nekuda kwekunyanya kwayo kupisa kwekudzivirira.
4. laminate yakakosha ine kurasikirwa kwakaderera (Zvinhu zvePCB zveHigh-Frequency):
   • Td Range: 360 ° C kusvika 400 ° C
   • Mhuri dze laminate dzakanyanya kurasikirwa zvakanyanya dzinoshandiswa mukushandiswa kwemafrequency akawanda uye maRF. Zvinhu izvi zvinopa kugadzikana kwakanyanya kwekupisa uye hunhu hwakanaka hwemagetsi kune kutaurirana uye masisitimu eradar.
5. Ceramic-Yakavakirwa PCBs:
   • Td Range: Pamusoro pe400°C
   • Ceramic-based PCBs anoshandiswa munzvimbo dzinopisa zvakanyanya, senge magetsi emagetsi, uko ese ari maviri epamusoro ekupisa conductivity uye yakanyanya kupisa kuramba inodiwa.

Aya makoshero ndeaya akajairwa, uye chaiwo zvinhu mukati mechikamu chega chega zvinogona kunge zvakati siyanei Td hunhu hunoenderana nemugadziri. Kusarudzwa kwezvinhu zvePCB zvine kukosha kweTd kwakakosha kuti uve nechokwadi chekuvimbika mune zvese zvekugadzira uye nharaunda dzekushanda.

Kunzwisisa Hukama pakati peTd naTg

Td (Decomposition Temperature)

• tsananguro: Td ndiyo tembiricha apo zvinhu zvePCB zvinotanga kusangana nekuora kwemakemikari zvisingadzoreki. Ichi chikumbaridzo chakakosha kuti unzwisise kuti chinhu chinogona kumira sei zvakanyanya kugadzira maitiro senge solder uye reflow.
• Relevance: A high Td value inovimbisa kuti zvinhu zvinoramba zvakagadzikana panguva yekupisa-kupisa uye kushanda kwenguva refu munzvimbo dzinoda kupisa, dzakadai semunhare, motokari, uye aerospace electronics.
• Akajairika Range: Td kukosha kwezvinhu zvePCB zvinowanzobva pa300 ° C kusvika 350 ° C kana kupfuura, zvichienderana nekuumbwa kwezvinhu.

Tg (Glass Transition Temperature)

• tsananguro: Tg inoreva tembiricha iyo zvinhu zvinoshanduka kubva payakaomarara, ine girazi kuenda kune inoshanduka, ine rubbery. Kusiyana neTd, uku kushanduka kwemuviri kunokanganisa ma mechanika eiyo PCB zvinhu.
• Relevance: Tg yakakosha pakusarudza maitiro emuchina wezvinhu panguva yekushanda nguva dzose. Kupfuura Tg panguva yekushandiswa kwakajairika kunogona kukonzera deformation, warping, kana kupaza kwePCB.
• Akajairika Range: Tg tsika dzinowanzosiyana kubva 130 ° C kusvika 180 ° C yezvakajairwa PCB zvinhu, ine yepamusoro-performance zvinhu zvinopa Tg kukosha pamusoro 200 ° C.

Misiyano Yakakosha Pakati peTd neTg

• Chimiro Chekuchinja:
  • Td: Inomiririra kuparara kwemakemikari kwezvinhu.
  • Tg: Inomiririra shanduko yemuviri kubva payakaoma kuenda kune inochinjika.
• Kufunga nezveTembiricha:
  • Td: Inoratidza kushorwa kwezvinhu pakupisa kwakanyanya panguva yekugadzira.
  • Tg: Inoratidza kugona kwechinyorwa kuchengetedza kutendeseka kwemuchina panguva yenguva dzose yekushandiswa kwekushandisa.
• Impact paKugadzira Bhodhi Redunhu:
  • Td: Yakakosha kune yakakwirira-tembiricha maitiro senge soldering uye reflow.
  • Tg: Yakakosha pakuona kuti PCB inochengetedza simba rayo remagetsi panguva yekushandiswa kwakajairika mumidziyo yemagetsi.

mhedziso

Mukugadzira bhodhi redunhu, kunzwisisa uye optimize kukosha kweTd kwakakosha pakugadzira yakavimbika, yepamusoro-inoshanda maPCB anogona kumirisana nekupisa kwekushushikana kwekugadzira uye kushanda kwezvinodiwa zvemagetsi emazuva ano. Nekusarudza zvinhu zvine yakakwira Td kukosha uye kunyatso gadzirisa maitiro ekugadzira, mainjiniya anogona kuve nechokwadi chekusimba, kuita, uye hupenyu hurefu hwezvigadzirwa zvemagetsi mumaindasitiri akasiyana siyana.

Kubatanidza ruzivo rwezvose zviri zviviri Td neTg mukuita dhizaini inobvumira kugadzirwa kwemabhodhi edunhu ayo asingangoshingiri akanyanyisa mamiriro ekugadzira asi zvakare anoenderera mberi achiita zvakavimbika munzvimbo dzavanoda kushandisa. Uku kuenzanirana kwekungwarira kwekufunga kwekupisa kwakakosha pakuunza zvemagetsi zvemhando yepamusoro zvinosangana nekukura kuri kuita maindasitiri epamusoro.