Imboni yezinto ze-PCB ichithe amanani amakhulu wesikhathi sokuthuthukisa izinto ezihlinzeka ngokulahleka kwesiginali okuphansi kakhulu. Ngejubane eliphezulu kanye nemiklamo ephezulu kakhulu, ukulahleka kuzokhawulela ibanga lokusakazeka kwezimpawu nezimpawu zokuhlanekezela, futhi kuzodala ukuphambuka kokuphazamiseka okungabonakala ngezilinganiso ze-TDR. Njengoba siklama noma iyiphi ibhodi yesekethe ephrintiwe futhi sithuthukise amasekethe asebenza ngamaza aphezulu, kungahle kulinga ukukhetha ithusi elibushelelezi kakhulu kuyo yonke imidwebo oyidala ngayo yonke imiklamo oyidala.

Yize kuyiqiniso ukuthi ukuqina kwethusi kwakha ukuphambuka nokulahleka okungeziwe kokunye, ingabe kubushelelezi kangakanani i-foil yakho yethusi? Ngabe zikhona ezinye izindlela ezilula ongazisebenzisa ukunqoba ukulahleka ngaphandle kokukhetha ithusi elibushelelezi kulo lonke umklamo? Sizobheka la maphuzu kule ndatshana, nalokho ongakubheka uma uqala ukuthenga ngezinto zokwakha ze-PCB.

Izinhlobo zeI-PCB Copper Foil

Imvamisa lapho sikhuluma nge-Copper ngezinto zokwenziwa kwe-PCB, asikhulumi ngohlobo oluthile lwethusi, sikhuluma kuphela ngobulukhuni bayo. Izindlela ezahlukahlukene ze-Copper zethusi zikhiqiza amafilimu anamanani ahlukene obulukhuni, angahlukaniswa ngokucacile emfanekisweni we-elektroni omcone (sem). Uma uzobe usebenza ngamanani aphezulu (imvamisa i-5 GHZ WiFi noma ngaphezulu) noma ngejubane eliphezulu, bese unaka uhlobo lwethusi oluchazwe kwi-datasheet yakho ebonakalayo.

Futhi, qiniseka ukuthi uyakuqonda okushiwo amanani we-DK ku-datasheet. Bukela le ngxoxo ye-podcast noJohn Coonrod kusuka kumaRogers ukuze afunde kabanzi mayelana nokucaciswa kwe-DK. Unalokho engqondweni, ake sibheke ezinye izinhlobo ezahlukene ze-PCB yethusi Foil.

I-Electrodeposted

Kule nqubo, isigubhu siphonswa nge-electrodetic solution, futhi ukusabela kwe-electrodeposition kusetshenziselwa "ukukhula" i-foil yethusi esigubhini. Njengoba i-Drum ijikeleza, ifilimu yethusi eliphumela ligoqwe kancane ku-roller, linikeze ishidi eliqhubekayo lethusi elingemuva kamuva likhishwe ku-laminate. Uhlangothi lwesigubhu sethusi luzofana ngokusobala ubulukhuni besigubhu, kanti uhlangothi oluveziwe luzoba lukhuni kakhulu.

I-Electrodepososited PCB Copper Foil

Ukukhiqizwa kwe-Fopper electrodeposed.
Ukuze isetshenziswe kwinqubo evamile ye-PCB yokubukwa kwe-PCB, uhlangothi olunzima lwethusi luzoqala ukuhlanganiswa ku-dielectric ye-aeelyric yengilazi. I-Copper esetshenzisiwe esele (uhlangothi lwesigubhu) kuzodingeka ukuthi luhlukaniswe ngamakhemikhali ngamakhemikhali (isib. Nge-plasma etching) ngaphambi kokuthi isetshenziswe kwinqubo ejwayelekile ye-CRAP CLAD. Lokhu kuzoqinisekisa ukuthi kungahlanganiswa kungqimba elilandelayo kwi-PCB Statup.

I-ElectrodePed ElectrodePeted Fopper

Angazi isikhathi esihle kunazo zonke esifaka zonke izinhlobo ezahlukahlukene ze-Performut zaphathweama-foils ethusi, kanjalo isihloko esingenhla. Lezi zinto zethusi zikwaziwa kakhulu ngokuthi ama-foils aphathwe emuva, yize okunye ukwehluka okubili kutholakala (bheka ngezansi).

I-Reverse yaphathwe ama-foil isebenzisa ukwelashwa okungaphezulu okusetshenziselwa uhlangothi olubushelelezi (isigubhu ohlangothini) sephepha lethusi ele-elektrosi. Isendlalelo sokwelashwa kumane nje kungukuhlanganiswa okuncane okuhlanganisa ithusi, ngakho-ke kuzoba nokunamathela okukhulu kokuqukethwe kwe-dielectric. Lezi zindlela zokwelapha zisebenza njengesithiyo se-oxidation esivimbela ukugqwala. Lapho le Copper isetshenziselwa ukudala amaphaneli ama-liminate, uhlangothi oluphathwayo luboshelwe ku-dielectric, futhi uhlangothi olubi olusalokhu luyavezwa. Uhlangothi oluveziwe ngeke ludingeke ukuqina okwengeziwe ngaphambi kokuqongelela; Kuzovele kunamandla anele okubopha ungqimba olulandelayo ku-PCB Statup.

Ukuhlukahluka kokuhluka kwe-Fop Propper okuphathwe kabusha kufaka phakathi:

I-Fopper Foil ephezulu kakhulu yokushisa (HTE) Ubuso obudaluliwe buphinde baphathwa ngesithiyo se-oxidation ukuvikela ukugqwala ngesikhathi sokugcina.
I-Foil ephethwe kabili: Kulesi foliya yethusi, ukwelashwa kusetshenziswa ezinhlangothini zombili zefilimu. Lokhu okuqukethwe kwesinye isikhathi kubizwa ngokuthi i-Frum-Side yaphathwe i-foil.
I-PROPER ENGABUCHWEPHESHE: Lokhu akuvalwa ngokujwayelekile njengethusi eliphathwe ngaphandle. Le folpoil ye-Copper isebenzisa ukunamathela kwensimbi phezu kohlangothi lwe-matte lwethusi, olube selibunjiwe ezingeni elifunekayo.
Isicelo sokwelashwa esingaphezulu kulezi zinto zethusi siqondile: i-foil idluliswa ngamabhati angeziwe we-electrolyte afaka iplanethi yethusi yesibili, elandelwa ungqimba lwembewu yokuvila, ekugcineni ekugcineni i-anti-tarnish lealeya lefilimu.

I-PCB Copper Foil

Izinqubo zokwelashwa ezingaphezulu kwe-Folip Foils. [Umthombo: Pytel, Steven G., et al. "Ukuhlaziywa kokwelashwa kwethusi nemiphumela ekusakazweni kwesiginali." Ngo-2008 58th Izakhi ze-elekthronikhi ze-elekthronikhi kanye nenkomfa yezobuchwepheshe, i-PP. 1144-1149. Ieee, 2008.]
Ngalezi zinqubo, unezinto ezibonakalayo ezingasetshenziswa kalula kwinqubo yokubukwa kwebhodi elijwayelekile ngokucutshungulwa okuncane.

Ithuli eligoqiwe

Ama-Foils we-Colled-anpeed anpeed azodlula umqulu we-foil wethuli ngokusebenzisa ama-roller, azowakhulisa ishidi lethusi ekukhulumeni okufunayo. Ubulukhuni beshidi le-foil ephumela luzohluka ngokuya ngamapharamitha okugoqa (isivinini, ingcindezi, njll.).

Ishidi eliphumela lingaba bushelelezi kakhulu, futhi imichilo iyabonakala ebusweni bephepha eligoqiwe lethusi eligoqiwe. Izithombe ezingezansi zibonisa ukuqhathanisa phakathi kwe-foil ye-foil ye-electrodepososited kanye ne-foil egoqwe.

I-PCB yethusi Foil Foil

Ukuqhathaniswa kwe-Electrodeposososited VS.
Ithusi lephrofayela eliphansi
Lokhu akulona uhlobo lwe-foil ye-popper ongalusa ngenqubo ehlukile. I-Low-Projecle Phalale yethusi yi-electrodepososited yethusi ephathwa futhi eguqulwe ngenqubo enobuchule obuncane ukuhlinzeka ngobunzima obuphansi kakhulu ngokuqina okwanele kokunamathela ku-subhesion ku-subthesion. Izinqubo zokukhiqiza lezi zinhlaka zethusi zivame ukuwuphathelene. Lezi zinhlamvu zivame ukuhlukaniswa njengephrofayili ye-Ultra-Low (ULP), iphrofayili ephansi kakhulu (i-VLP), kanye nephrofayili ephansi (i-LP, cishe i-1 micron roughness).

Izindatshana ezihlobene:

Kungani i-foil ye-post isetshenziswa ekukhiqizeni i-PCB?

I-Copper Foil isetshenziswa ebhodini lesekethe eliphrintiwe