PCB Middle Tg vs. High Tg: Kunzwisisa Kusiyana

PCBAs zvikamu zvakakosha zvemagetsi emazuva ano, zvinoshanda semusana wemidziyo yemagetsi. Magungano aya anoumbwa nezvinhu zvakasiyana-siyana, uye mashandiro avo uye kuvimbika kwavo zvinokanganiswa zvakanyanya nekusiyana kwekushisa. Chinyorwa chino chinotarisa zvakanyanya kukanganisa kwekuchinja kwekushisa paPCBAs, tichikurukura nezvehunhu hwekupisa hwezvinhu, pfungwa yeGirazi rekuchinja kweTembiricha (Tg), uye makirasi akasiyana ePCB Tg. Uyezve, tinoongorora mashandisirwo nemabhenefiti ePCBs dzeTg dzakakwira uye tinojekesa kukosha kwezvinhu zvepakati zveTg mumikana chaiyo yekushandisa. Chekupedzisira, tinoongorora matekiniki akasiyana-siyana ekuongorora kupisa ekuongorora zvinhu zvePCB uye zvakanakira zvadzo.

Kuchinja kwematembiricha kunogona kuve nesimba rakakura pamhando, kuvimbika, uye kushanda kwePCBAs. Sezvo tembiricha inowedzera, zvinhu zvinowanzowedzera. Nekudaro, maPCB anowanzo kuumbwa nezvinhu zvine akasiyana coefficients ekuwedzera kwekupisa (CTE), zvichitungamira kune kushushikana kwemagetsi. Kushushikana uku kunogona kuita kuti pave nekuumbwa kwezvisina kuonekwa micro-cracks panguva yekuedzwa kwemagetsi, zvakadai sekuedzwa kwenguva pfupi / kuzarura, iyo inoitwa panguva dzekupedzisira dzekugadzira. Aya madiki-akatsemuka anogona kutungamira mukutadza kunova pachena mushure mekuita kwegungano, zvichikonzera kukanganisa kwakasiyana kwechigadzirwa.

Kunzwisisa Glass Transition Temperature (Tg)

Muna 2002, iyo Restriction yeHazardous Substances (RoHS) mirairo yakaunzwa, ichiraira kushandiswa kwe lead-isina alloys ye soldering mumagungano emagetsi. Kubviswa kwemutobvu kubva kune solder alloys kwakakonzera kupisa kwakanyanya kunyunguduka, kuburitsa maPCB pakupisa kukuru panguva yekushambadzira, kusanganisira wave uye reflow soldering. Naizvozvo, kusarudza maPCB ane akakodzera emuchina maitiro, kunyanya ayo ane akakodzera Girazi Shanduko Temperature (Tg), yakave yakakosha pakuona maitiro egungano akavimbika.

Tg chinhu chakakosha chemuchina chinoratidza tembiricha apo chinhu chinoshanduka kubva payakaoma, yakasimba, uye ine girazi kuenda kune imwe rubbery state. Kana Tg yapfuudzwa, zvinhu hazvinyunguduke asi zvinochinja magadzirirwo, zvichiva rubbery muzvisikwa. Kuyera Tg nemazvo kunonetsa nekuda kwezvikonzero zvakasiyana, kusanganisira chimiro chemolecular yezvinhu. Zvishandiso zvakasiyana zvine Tg hunhu hwakasiyana, kunyangwe hunhu hwavo hwehunyanzvi hwakasiyana. Zvikuru, viscosity yechinhu inowedzera kana ichipisa uye inogona kutungamira pakutyoka kana kuputika mushure mekutonhora.

Kukosha kwePCB Tg

Muchirevo chePCBs, Tg inomiririra tembiricha iyo iyo polymer zvinhu zvinoshanduka kubva kune yegirazi uye yakaoma nyika kuenda kune yakapfava kana kuchinjika. Iyi shanduko ye thermodynamic inogona kudzoserwa chero bedzi iyo polymer zvinhu zvisingaenderane nekuora. Tg inonyanya kukosha nekuti izvo organic zvinhu mu base zvinhu, zvakaita semahydrocarbons nemabhainda, kazhinji zvine kudzikama kwetembiricha zvichienzaniswa nezvinoumba inorganic zvezvinhu zvakaumbwa.

Kuedza kwakaitwa kuvandudza zvimiro zvekupisa zvemapolymers kuti aite akakodzera semabhainda muPCB. Nekudaro, zvivakwa izvi zvichiri kusara kumashure kwekugadzikana kwekupisa kwesimbi foil, inosimbisa girazi fibers, uye ceramic fillers. Nekuda kweizvozvo, pakaunzwa tekinoroji isina lead-isina solder, kunyangwe kuwedzera kudiki kwetembiricha yekutengesa kwakakanganisa zvakanyanya kugadzikana kwekushisa kwePCB binder polymers.

Makirasi ePCB Tg

PCB Tg yakakamurwa mumakirasi akati wandei zvichienderana nematembiricha avanofukidza:

1. Yakakwira Tg PCB: Yakakwira Tg PCBs inozivikanwa nepamusoro pekuita kwavo kupisa. Kunyange zvichiwanzotendwa kuti yakakwirira Tg tsika dzinogara dziri nani, hukama hwacho hunowedzera nuanced. Hwepamusoro Tg tsika dzinononoka kutanga kwekuwedzera kwekupisa kweiyo chaiyo polymer system. Nekudaro, maitiro ekuwedzera ekuwedzera anogona achiri kusiyana pakati pezvinhu. Zvishandiso zvine tembiricha yakaderera yegirazi inogona kuratidza yakaderera mambure ekuwedzera zvichienzaniswa nemidziyo ine yakakwirira Tg kukosha.
2. Medium Tg PCB: Medium Tg PCBs inoratidzirwa nepakati Tg tsika. Vanopa chiyero pakati pekubhadhara mari uye kushanda kwekushisa. Medium Tg zvinhu zvinowanzo tsvaga maapplication uko yakakwira Tg PCB isina kukosha asi zvirinani kugadzikana kwekupisa kuchiri kudikanwa kana uchienzaniswa neyakajairwa maPCB.
3. Yakaderera Tg PCB: Yakaderera Tg PCBs ine yakaderera Tg kukosha uye anoshandiswa mumashandisirwo uko mutengo uye nekupisa kwekuita zvinotariswa zvinoenderana nemidziyo yezvinhu izvi.

Zvishandiso zveHigh Tg PCBs

Yakakwira Tg PCBs inowana zvikumbiro mumaindasitiri akasiyana siyana uye mamiriro ezvinhu uko kwakasarudzika kugadzikana kwemafuta uye kuvimbika kwakakosha:

1. Zvishandiso Zvekutaurirana: Midziyo yetiweki, fiber optic yekutaurirana michina, uye isina waya base zviteshi zvinoda yakakwira Tg PCB nekuda kwekuda kwavo kweakanakisa kuvimbika kwemagetsi uye kuita munzvimbo dzepamusoro-frequency uye dzepamusoro-tembiricha.
2. Industrial Control Equipment: Yakakwira Tg PCBs anoshandiswa mumarobhoti, otomatiki masisitimu, uye maindasitiri ekudzora midziyo inoshanda mukunyorova kwepamusoro-soro, kudziya kwepamusoro, uye nharaunda-inozunguza, inoda simba rakasimba remuchina uye kugadzikana kwekupisa.
3. Zvemagetsi zveMotokari: Sensors, pa-bhodhi makomputa, madhibhodhi, uye masisitimu akakosha mumotokari anobatsirwa nekushandiswa kwepamusoro Tg PCB. Motokari dzemukati dzinowanzoona kushanduka kwekushisa kwakanyanya, zvichida maPCB anogona kumirisana nekupisa kwakanyanya.
4. Aerospace: Indasitiri yezvemuchadenga inoda midziyo yemagetsi ine yakakwirira-tembiricha kuramba uye kuvimbika. Yakakwira Tg FR4 PCBs anoshandiswa zvakanyanya mumasetelliti, ndege, uye midziyo yekufambisa kutsungirira kushanduka kwekushisa kwakanyanya uye mamiriro ekushanda akaomarara.
5. Zvishandiso zvekurapa: Midziyo yekurapa inoda kugona kushanda pasi pekupisa-tembiricha disinfection uye sterilization mamiriro. Yakakwira Tg PCBs inoita basa rakakosha mukudzora makombora, radar masisitimu, hunyanzvi hwekushandisa, kutaurirana nemauto, uye zvimwe zvakasiyana zvekushandisa zvekurapa.

Zvakanakira High Tg PCBs

Yakakwira Tg PCBs inopa akati wandei mabhenefiti nekuda kweakasarudzika ekupisa zvivakwa:

1. Yakakwira Temperature Durability: Yakakwira Tg PCBs inoratidza kuramba kwakanyanya kune yakanyanya kupisa tembiricha uchichengetedza kutendeseka kwechimiro. Izvo hazvikanganise kana kuchinjika kana zvaiswa mukupisa, kuve nechokwadi chekuenderera mberi kwekuita pasi pekunyanya kupisa kwekushushikana.
2. Huru Mechanical Simba: Aya maPCB akatsiga uye anokwanisa kumirisana nepamusoro pekushushikana uye kudzvanywa. Nechimwe nechimwe chekuwedzera, kusimba kwavo uye mashandiro emuchina anovandudza.
3. Kuvimbika Kwakawedzerwa: Yakakwira Tg PCBs inovimbika kupfuura yakajairwa maPCB, inogara ichiunza kwakaringana kuita kwemagetsi kunyangwe mumamiriro ekunze akaomarara ane tembiricha yakanyanyisa.
4. High Power Density: MaPCB echinyakare anonetsekana nepamusoro-simba density maapplication nekuda kwekupisa kunoitwa nezvikamu. High Tg PCBs inogona kunyatso bvisa kupisa, zvichibvumira kuiswa kwezvimwe zvikamu pabhodhi pasina kunyanya kunetseka.

Zvivakwa zvePamusoro Tg PCBs

Yakakwira Tg PCB zvinhu zvine huwandu hwezvinhu zvinobatsira izvo zvinobatsira mukukodzera kwavo kwekuda maapplication:

1. Yakaderera Thermal Kuwedzera: Zvishandiso izvi zvinoratidza kuderera kwekuwedzera kwemafuta, kunyanya munzira inochinjika, iyo yakakosha pakuchengetedza kugadzikana kwedimensional, kunyanya mumabhodhi eHigh-Density Interconnect (HDI).
2. High Temperature Resistance: Yakakwira Tg PCBs akagadzirirwa kuramba tembiricha yakakwira, kuve nechokwadi kuti anoita zvakavimbika kunyangwe mukupisa kwakanyanya.
3. Yakanakisa Mechanical Zvivakwa: Ivo vanopa yakanakisa mechani simba, vachiwedzera kugona kwavo kutsungirira kushushikana kwemechani uye kuchengetedza kuita.
4. Yakakwirira Yakaputirwa Kuburikidza-Gomba Kuvimbika: Kuvimbika kweakaputirwa nemakomba (PTHs) inovandudzwa zvakanyanya muTg PCBs dzakakwirira, kuderedza dambudziko rekukundikana nekuda kwekunetseka kwekushisa.
5. Yakakwira Thermal Stress Resistance: Zvishandiso izvi zvine kupikisa kwakanyanya kushushikana kwekupisa, zvichiita kuti zvikodzere maapplication ari pasi pekukurumidza kushanduka kwekushisa.

Iwe Unoda Rini Yakakwira Tg PCBs?

Kudiwa kwepamusoro Tg PCBs kunomuka kana:

1. Iyo yekupisa mutoro paPCB yako iri mukati me25 ℃ yeiyo Tg kukosha.
2. Chigadzirwa chako chinoshanda nguva dzose patembiricha ye130 ℃ kana kupfuura.
3. Iwe uri kushandura kuRoHS-inoenderana PCBs, iyo inowanzoda yakakwirira Tg zvinhu.

High Tg PCBs inonyanya kukosha mune lead-isina soldering maitiro, uko kuwanda kweyepamusoro-tembiricha maapplication anoda zvinhu zvinokwanisa kutsungirira kuwedzera kwekupisa kwekushushikana.

Pakati Tg PCB Material

Pakati Tg PCB zvinhu zvinotora nzvimbo yakakosha munzvimbo yeakadhindwa edunhu mabhodhi, achishandira chaiwo maapplication anoda chiyero chezvivakwa. Izvi zvinhu zvinoratidzwa nepakati tembiricha yegirazi tembiricha uye inopa zvakasarudzika zvakanakira:

1. Anti-CAF Property: Pakati Tg PCB zvinhu zvinopokana neConductive Anodic Filament (CAF), zvichiita kuti ive yakakodzera PCB yekugadzira uko CAF iri kunetsekana.
2. Kunoshamwaridzana Nezvakatipoteredza: Zvishandiso izvi hazvina phosphorus uye halogen, zvichiita kuti vachengetedze nharaunda.
3. UL-94 Kupisa: Pakati Tg PCB zvinhu zvinonamatira kune UL-94 V-0 mazinga ekupisa, zvichipa ruzivo rwekuita kwavo kupisa.
4. Yakanakisa Thermal Performance: Pakati Tg zvinhu zvinoratidzira zvakanakisa kupisa zvivakwa, zvichiita kuti ive yakanakira kugadzira akaomesesa edunhu mabhodhi uye mamwe epamusoro-kuita maapplication.

Zvishandiso zveMiddle Tg PCBs

Middle Tg PCBs anoshandiswa mune akasiyana maapplication, anosanganisira:

1. Consumer Electronics: Single-sided substrates ine yepakati Tg zvinhu zvinowanzo shandiswa muvatengi zvemagetsi midziyo yakadai semafoni, keyboards, game consoles, uye stereos.
2. Sirivha Kuburikidza neHole Substrates: Pakati Tg PCBs dzakakodzera kunyorera uko mhangura yekuisa haigone kuumba kuburikidza-maburi, uye kuburikidza-maburi anogadzirwa nekuazadza nesirivheri paste.

Thermal Analysis Techniques yePCB Middle Tg

Kuongorora mashandiro ekupisa kwePCB zvinhu kwakakosha kune vanogadzira zvemagetsi. Matekinoroji akawanda ekuongorora kupisa aripo kuti aongorore PCB zvinhu, zvinosanganisira:

1. Thermomechanical Analysis (TMA): TMA inoyera shanduko mune zvenyama zvimiro zvinoenderana nekusiyana kwetembiricha. Inoongorora shanduko yedimensional, vhoriyamu, density, uye zvimwe zvivakwa, ichibatsira kuona tembiricha yegirazi (Tg) uye kugadzikana kwedimensional.
2. Thermogravimetric Analysis (TGA): TGA inoyera huremu hwechinhu chinoshanduka sezvo ichiiswa pasi pekudzora tembiricha inowedzera. Inopa manzwisisiro mukurasikirwa nehuremu uye hukama hwekushisa, zvichibatsira mukunzwisisa kuparara kwemafuta uye kugadzikana kwezvinhu.
3. Dynamic Mechanical Analysis (DMA): DMA inoongorora viscoelasticity yechinhu, inova musanganiswa we viscosity uye elasticity. Iyo inoongorora kuti zvinhu zvinotambanudzwa sei uye zvinokotama sei kana zvichiiswa pasi pekufamba uye shanduko yekushisa. DMA yakakosha pakudzidza Tg uye thermal properties.

Mainjiniya vanowanzo simbisa nyaya iyi pamwe chete nekugadzirwa kwePCB ine simba remagetsi uye zvinyorwa zvePCB zvinoshandura simba pavanenge vachigadzira PCB kana PCBA yakavimbika.

Pakati Tg PCB Material vs. High Tg PCB Material

Yakadhindwa Circuit Boards (PCBs) ndiwo musana wemagetsi emazuva ano, uye kusarudza iyo chaiyo PCB zvinhu kwakakosha pakuita kwechigadzirwa uye kuvimbika. Mhando mbiri dzakajairika dzePCB zvinhu zvine akasiyana ekupisa zvivakwa ndeye Middle Tg (Glass Transition Temperature) uye High Tg PCBs. Mukuongorora uku kwekuenzanisa, tichaongorora mutsauko uripo pakati peMiddle Tg uye High Tg PCB zvinhu, mashandisiro azvo, uye nguva yekusarudza imwe pamusoro peimwe.

1. Glass Transition Temperature (Tg):
   • Pakati Tg PCB Material: Pakati Tg PCBs ane girazi shanduko tembiricha kazhinji kubva pakati 130 ℃ uye 150 ℃. Izvi zvinoreva kuti vanogona kutsungirira tembiricha iri pakati nepakati pasina kurasikirwa nehunhu hwavo.
   • Yakakwira Tg PCB Material: Yakakwira Tg PCBs, kune rumwe rutivi, ine tembiricha yegirazi inodarika 170 ℃. Izvi zvinhu zvinogona kutsungirira zvakanyanya kupisa tembiricha pasina kuita shanduko kuenda kune rubbery state.
2. Thermal Stability:
   • Pakati Tg PCB Material: Pakati Tg PCBs inopa kugadzikana kwakanaka kwekupisa uye inokwanisa kubata huwandu hwakasiyana hwemagetsi ekushandisa pasina nyaya. Izvo zvakakodzera kune zvigadzirwa zvinoshanda mukati mepakati tembiricha renji.
   • Yakakwira Tg PCB Material: Yakakwira Tg PCBs inokunda mukugadzikana kwekupisa uye yakanakira maapplication ari pasi petembiricha yakakwira. Vanochengetedza kutendeseka kwavo kwechimiro kunyangwe munzvimbo dzine tembiricha yepamusoro, zvichiita kuti dzive dzakakodzera kukumbira zvikumbiro.
3. Applications:
   • Pakati Tg PCB Material: Pakati Tg PCBs anowanzo shandiswa muvatengi zvemagetsi, senge ma smartphones, keyboards, uye maodhiyo emidziyo, uko tembiricha yekushanda iri mukati mepakati Tg renji. Izvo zvakare zvakakodzerwa kune akawanda-chinangwa chemagetsi zvishandiso.
   • Yakakwira Tg PCB Material: Yakakwira Tg PCBs inowana kushandiswa kwakawanda mumaindasitiri uko kuratidzwa kune tembiricha yepamusoro kwakajairika. Izvi zvinosanganisira mota dzemagetsi, aerospace, maindasitiri ekudzora masisitimu, uye yakakwirira-frequency yekutaurirana michina.
4. Mafungiro Ezvakatipoteredza:
   • Pakati Tg PCB Material: Pakati Tg PCB zvinhu zvinowanzoenderana nenharaunda, isina phosphorus kana halogen. Iwo isarudzo yakanaka kana mirau yezvakatipoteredza uye kusimba kuri pamberi.
   • Yakakwira Tg PCB Chishandiso: Yakakwira Tg PCB zvinhu zvinogona kunge zvine zvekuwedzera zvekusimudzira zvivakwa zvavo zvinopisa, izvo zvinogona kukanganisa chimiro chavo chezvakatipoteredza. Funga nezvemitemo yezvakatipoteredza kana uchisarudza yakakwirira Tg zvinhu.
5. Mariro:
   • Pakati Tg PCB Material: Pakati Tg PCB zvinhu zvinowanzo dhura-inoshanda kupfuura avo akakwira Tg vamwe vavo. Izvi zvinovaita sarudzo inosarudzika yemapurojekiti ane hanya nebhajeti.
   • Yakakwira Tg PCB Material: Yakakwira Tg PCB zvinhu zvinowanzo kudhura nekuda kweiyo yepamusoro yekupisa zvivakwa. Nekudaro, iyo mari yakawedzerwa inoruramiswa mumashandisirwo anoda kukwirisa-tembiricha kuramba.
6. Mashandisirwo Akanyanya Makesi:
   • Pakati Tg PCB Material: Sarudza Middle Tg PCBs kune maapplication asingade yakanyanyisa tembiricha kuramba asi anoda chiyero chemutengo-unoshanda, kugadzikana kwekupisa, uye kuvimbika.
   • Yakakwira Tg PCB Chishandiso: Sarudza Yepamusoro Tg PCBs paunenge uchigadzira zvigadzirwa zvakagadzirirwa nharaunda dzakaomarara dzine tembiricha yakakwira, zvinotemesa kuvimbika zvinodiwa, uye hupenyu hwesevhisi hwakawedzerwa.

Mhedziso: Sarudzo pakati peMiddle Tg nePamusoro Tg PCB zvinhu zvinoenderana nezvinodiwa zvetembiricha yako yekushandisa, zvimhingamipinyi zvebhajeti, uye kufunga kwezvakatipoteredza. Middle Tg PCBs inokodzera kuwanda kweyakajairwa zvigadzirwa zvemagetsi, nepo High Tg PCBs yakakosha kune maapplication ari pasi pekupisa kwakanyanya uye mamiriro anodaidzira. Kunyatsosarudzwa kwezvinhu zvakakosha kuti uve nechokwadi chekushanda kwenguva refu uye kuvimbika kwezvigadzirwa zvako zvemagetsi.

mhedziso

Kusiyana kwetembiricha chinhu chakakosha kufunga munyika yePCBA, uko zvivakwa zvenyama, kunyanya Glass Transition Temperature (Tg), inoita basa rakakosha mukuona kuvimbika nekuita. Yakakwira Tg PCBs inowana maapplication mumaindasitiri anodaidzira, achipa yakasarudzika yekupisa kupikisa, simba remuchina, uye kuvimbika. Pakati Tg PCB zvinhu zvinoshandisa zviitiko zvekushandisa zvinoda chiyero chezvivakwa, zvinosanganisira kuramba kuConductive Anodic Filament (CAF) uye kushamwaridzana kwezvakatipoteredza. Tekinoroji dzekuongorora dzemafuta dzinopa ruzivo rwakakosha muPCB zvinhu 'zvinopisa zvivakwa, zvichibatsira mukusarudza zvinhu uye dhizaini dhizaini. Kunzwisisa kukanganisa kwekushisa paPCBAs uye kusarudza zvinhu zvakakodzera matanho anokosha mukuona hupenyu hurefu uye kushanda kwezvigadzirwa zvemagetsi mumamiriro akasiyana ekushanda.