Mutengo-Kuchengetedza Kumashure Kuchera Technology kune Multi-Layer PCBs

Kuboora kumashure inzira inokosha mukugadzira maPCB inobvisa zvisingadiwe kuburikidza nemastubs, izvo zvinogona kukonzera kukanganiswa kwezviratidzo, kuora, uye kurasikirwa mumashandisirwo anoitwa kakawanda uye nekukurumidza. Chinyorwa chino chinotarisa zvakadzama tekinoroji, matekiniki, uye nzira dzakanakisisa dzekuchera kumashure, tichiongorora kuti ndeapi nguva yekufunga nezvemaitiro aya, zvakanakira, uye matanho ehunyanzvi anobatanidzwa mukuita izvi zvinobudirira.

Chii chinonzi Back Drilling?

Kuboora kumashure, kana kuti kubhoora kwakadzama kwakadzorwa, inzira inoshandiswa kubvisa zvikamu zvisina kushandiswa zvemaburi akaputirwa ( PTHs ) muPCB. MumaPCB ane layer akawanda , mavia (vertical interconnect accesses) anoshandiswa kubatanidza matrace pakati pezvikamu zvakasiyana. Zvisinei, mumagadzirirwo e high-frequency, zvikamu zvemavia zvinotambanuka kupfuura layer yesignal—inozivikanwa se via stubs—zvinogona kuunza migumisiro isingadiwe yakadai se signal reflection, impedance discontinuities, uye crosstalk. Kuboora kumashure kunobvisa zvikamu izvi zvisina kushandiswa, zvichigadzira nzira yakachena yesignal uye kuderedza kupindira, izvo zvakakosha kumashandisirwo ekumhanya kwakanyanya.

Kunzwisisa Via Stubs uye Mabatiro Avo paPCB Kuita

A via stub ndicho chikamu chisina kubatanidzwa chenzira chinopfuudza nepamusoro penzvimbo yakanangwa panogumira chiratidzo. Iyi "yakafa-kuguma" chikamu cheiyo via inogadzira inductive uye capacitive mutoro, ichiunza parasitic mhedzisiro inosvibisa chiratidzo chechiratidzo. Kumaseketi ekumhanya-mhanya anoshanda muGHz renji, kunyangwe diki kuburikidza ne stub inogona kukonzera kuderera kwechiratidzo nekuda kwekuwedzera kwemagetsi kukanganiswa (EMI) uye chiratidzo chekuratidzira. Kuchera kumashure kunobvisa idzi stubs, kuderedza mhedzisiro uye kuve nechokwadi chekuvimbika chiratidzo chekuvimbika.

Nguva Yekufunga Nekushandisa Back Drilling

Haisi yega PCB dhizaini inoda kudhiriwa kumashure. Sarudzo yekushandisa back drilling zvinoenderana nezvakawanda zvinhu:

• • High-Frequency Designs: Kumaseketi anoshanda mu-high-frequency (GHz) renji, kunyangwe kukanganiswa kwechiratidzo kudiki kunogona kukanganisa kuita. Kuchera kumashure kwakakosha pakuona nzira dzakachena dzechiratidzo muRF, microwave, uye mamwe ma-high-frequency application.
  • High-Speed ​​Digital Applications: Mumagadzirirwo ayo mazinga ekufambisa data akakwira, senge munharembozha nenzvimbo dzedhata, kuchera kumashure kunobatsira kuderedza crosstalk uye kudzoreredza kwechiratidzo, kuve nechokwadi chekufambiswa kwedata nekukurumidza uye kwakavimbika.
  • Complex, High-Layer-Count Boards: MaPCB ane nhamba yakakwira yezvikamu anowanzo ane vias anotambanudzira kune akawanda akaturikidzana. Mumagadzirirwo aya, kuchera kumashure kunobatsira kubvisa zvisingakoshi zvikamu zvevias, kudzivirira kupindira mumapuranga akashongedzwa.
  • HDI (High-Density Interconnect) Mabhodhi: Kune HDI mabhodhi, ayo anoda yakakwirira yekubatanidza density munzvimbo dzakabatana, kuchera kumashure kunobvumira vagadziri kuti vatarise kutendeseka kwechiratidzo pasina kupa bhodhi nzvimbo kana kuwedzera layer count.
  • Signal Kutendeseka-Yakakosha Zvikumbiro: Pazvikumbiro zvemuchadenga, kudzivirira, motokari, uye midziyo yekurapa, uko kunoenderana uye kutendeseka kwechiratidzo kutendeseka kusingagone kutaurirana, kuchera kumashure kunowanzo kudikanwa.

Back Drilling Techniques uye Maitiro

Iyo yekumashure yekuchera maitiro inonetsa zvine hunyanzvi, inoda kurongeka kwepamusoro kudzivirira kukuvadza bhodhi. Heano kutarisisa kwakadzama pamatanho anobatanidzwa mukuita back drilling:

1. Kudzora-Kudzika Kwakadzika

Nheyo yekuchera kumashure iri mukudzora-kwakadzika kuchera. Sezvo chikamu chete che via chinoda kudhirwa kunze, kudzika kunofanirwa kunyatsodzorwa. Michina yekuchera yakasarudzika ine hudzamu hwekudzora masimba, kazhinji uchishandisa laser kutungamira kana otomatiki yekuyera kudzika masisitimu, inoshandirwa kuve nechokwadi chekuti chibooreso chinomira pakadzika chaidiwa. Kuchengeta uku kurongeka kwakakosha sezvo kunyangwe kutsauka kudiki kunogona kukuvadza pasi peturu kana kusiya akasara ma stubs angangokanganisa mashandiro.

2. Yakadzama Calculation uye Target Setting

Kudzika kwechinangwa chekuchera kumashure kunotemerwa nePCB stack-up uye dhizaini uko chiratidzo chinoda kupera. Mainjiniya anofanirwa kuverenga kudzika chaiko, achifunga zvinhu zvakaita sekukora kwemateya ega ega, copper plating, uye kushivirira kwechibhorani. Kunyatsoita uku kunoita kuti chibooreso chisvike pane chinodiwa pasina kukanganisa zvimwe zvikamu zvePCB.

3. Multi-Stage Drilling Process

Mune mamwe maPCB akaomarara ane nhamba yakakwira yezvikamu, akawanda matanho ekuchera kumashure anogona kudikanwa kuti asvike vias anogumira pakadzika kwakasiyana. Yese nhanho inoyerwa kune chaiyo yakanangwa kudzika, zvichibvumira kubviswa kwechidimbu kwema stubs pamatanho akasiyana pasina kukanganisa kumwe kubatanidzwa. Iyi nzira inonyanya kukosha mumabhodhi anoda kubviswa kwe stub pakadzika kwakasiyana.

4. Drill Bit Selection uye Maintenance

Kuchera kumashure kunoda mabhiti ekubooresa akagadzirirwa kunyatsojeka uye kusimba. Carbide drill bits inowanzoshandiswa nekuda kwekuoma kwavo uye kuramba kupfeka, izvo zvakakosha pakuchengetedza kudzika kunodiwa kwechokwadi. Iyo dhayamita yebhiti rekuboorera inofanirwa kunyatsoenderana nesaizi kudzivirira kukuvadzwa kuburikidza nemadziro, uye kugara uchigadzirisa mabhiti eku drill kwakakosha kuti uve nechokwadi chekushanda.

5. Kuchenesa uye Deburring

Mushure mekuita kuchera, marara akasara, anozivikanwa semaburrs, anogona kuungana mukati meiyo yakacherwa kuburikidza. Kuchenesa maburrs aya kwakakosha kudzivirira kusvibiswa kunogona kukanganisa kutendeseka kwechiratidzo. Mechanical brushing kana kuvhuvhuta kwemhepo kunowanzo shandiswa kubvisa marara, kuve nechokwadi chegomba rakacherwa rakachena, risina hurema.

Makiyi Paramita eKubudirira Kuchera Kumashure

Kuti uwane mibairo yakakwana, akati wandei ma paramita anofanirwa kudzorwa zvakanaka panguva yekuchera kumashure:

• • Drill Depth Precision: Kurongeka kwakakosha, sezvo chibooreso chinofanirwa kumira pamusoro penzvimbo yakanangwa. Kudzika kushivirira kunowanzo mukati ± 0.05 mm.
  • Drill dhayamita: Kusarudza dhayamita chaiyo kwakakosha kudzivirira kukuvadza kuburikidza nemadziro. Kusapindirana kunogona kutungamira kune kusasimba kwechimiro kana kusashanda kubviswa kwe stub.
  • Drill Speed ​​uye Feed Rate: High drill kumhanya inoshandiswa kudzivirira kupisa kwakanyanya kunogona kukonzera delamination. Chiyero chekudya chinofanira kuenzanisa kukurumidza uye kudzika kwekutonga.
  • Residual Stub Length: Chinangwa ndechekudzikisira kureba kwe stub, zvakanaka kuichengeta pazasi 0.2 mm kudzivirira chero yasara parasitic mhedzisiro.

Zvakanakira Back Drilling

Kuchera kumashure kunopa akawanda mabhenefiti epamusoro-kumhanya, akakwira-frequency PCB magadzirirwo:

• • Yakavandudzwa Chiratidzo Kuvimbika: Nekubvisa kuburikidza ne stubs, kuchera kumashure kunoderedza kuratidzwa kwechiratidzo uye kunove nechokwadi chekuchenesa nzira yechiratidzo, iyo yakakosha kuchengetedza kutendeseka kwechiratidzo mune yakakwirira-kumhanya maapplication.
  • Yakaderedzwa Crosstalk uye EMI: Kubvisa Stub kunoderedza mukana wekuyambuka pakati pezvikwangwani zviri padyo, kudzikisa EMI uye kuwedzera kuita kwese kwebhodhi.
  • Yakawedzera Data Transmission Rates: Kuchera kumashure kunowedzera kushanda kwechiratidzo chekufambisa, kubvumira kukurumidza kukurumidza data uye kutsigira kushandiswa kwepamusoro-soro.
  • Kuvimbika Kwakawedzerwa: Nekubvisa mhedzisiro yeparasitic, kuchera kumashure kunovimbisa kuti PCB inobata nguva dzose nekufamba kwenguva, kunyanya pasi pemamiriro epamusoro-frequency.
  • Space Optimization: Kumabhodhi eHDI, kuchera kumashure kunobvumira vagadziri kuti vagone kukwirisa nzvimbo pasina kukanganisa pane layer count, ichigonesa mamwe compact uye dense PCB marongero.

Nezvakanakira izvi, kuchera kumashure inzira yakakosha yekugadzira PCB yemazuva ano. Sezvinoratidzwa pamufananidzo uri pazasi, Highleap Electronic inopa yakazara-yekumira turnkey sevhisi yePCB nePCBA kugadzira, inosanganisira dhizaini, kugadzira, kusangana, uye kuyedza. Kugona kwedu kuchera kumashure kwepamusoro, kwakasanganiswa nezvinhu zvemhando yepamusoro uye kutonga kwemhando chaiyo, shuwa kuti PCB yega yega yatinoburitsa inosangana nezvinodiwa zvekumhanya-mhanya uye yakakwirira-frequency application.

Matambudziko uye Kuganhurirwa kweKuchera Kumashure

Nepo kuchera kumashure kunopa akawanda mabhenefiti, kunopawo mamwe matambudziko:

• • mutengo: Iyo yakasarudzika michina uye yekuwedzera kugadzirisa inodiwa pakuchera kumashure inowedzera kumitengo yekugadzira. Kuzvishandiso uko kunzwisiswa kwemitengo kuri kunetseka, kuchera kumashure kunogona kusagoneka.
  • Technical Complexity: Kuchera kumashure kunoda kunyatso kudzora, midziyo yepamberi, uye vane hunyanzvi vanoshanda, izvo zvinowedzera kuomarara kumaitiro ekugadzira.
  • Ngozi Yekukuvadzwa Kwemutsetse: Kana kudzika kwechibhorani kusingadzoreki nenzira kwayo, kune njodzi yekukuvadza maturu ari pedyo, izvo zvinogona kutungamirira kumaseketi mapfupi kana layer delamination.
  • Zvinhu Zvinorambidzwa: Hazvisi zvese zvePCB zvinhu zvinokwanisa kumira kushushikana kwekuchera kumashure. Yakakwira-Tg (girazi yekuchinja tembiricha) zvinhu zvinowanzofarirwa sezvo zvichipa kusimba kuri nani kune kupisa uye mechanical kusagadzikana.

Zviitiko Zvakanakisisa zveKushandisa Back Drilling

Kuti uwedzere kushanda kwekuchera kumashure, zvakakosha kutevedzera aya akanakisa maitiro:

1. Dhizaini neKumashure Drilling Mupfungwa: Ronga dhizaini yePCB kuona nzira dzakakosha dzechiratidzo dzingada kubviswa kwe stub. Ita shuwa kuti stack-up inogona kutsigira kuchera kumashure pasina kuisa njodzi kukuvadzwa kwechimiro.
2. Sarudza Vagadziri Vane ruzivo: Kudyidzana nevagadziri vane hunyanzvi mukuchera kumashure. Ruzivo rwavo uye midziyo inogona kuve nechokwadi chekuti nzira yekuchera kumashure inoitwa nemazvo.
3. Shandisa Zvishandiso Zvepamusoro-soro: Sarudza zvinhu zvePCB zvinokwanisa kumira kushushikana kwekuchera kumashure. High-Tg zvinhu zvinowanzokurudzirwa kumabhodhi anoda nzira iyi.
4. Shandisa Advanced Inspection Techniques: Shandisa automated optical inspection (AOI) uye X-ray ongororo kuona kuti kuchera kumashure kwaitwa nemazvo uye kunoenderana nemagadzirirwo ezvakatemwa.
5. Tevedzera Kutendeseka Kwechiratidzo: Shandisa chiratidzo chekutendeseka simulation maturusi kuti uongorore mhedzisiro yekuchera kumashure, kuve nechokwadi chekuti dhizaini inoita sezvinotarisirwa muchigadzirwa chekupedzisira.

mhedziso

Tekinoroji yekuchera kumashure chinhu chakakosha chemazuva ano chepamusoro-kumhanya, chepamusoro-frequency PCB dhizaini, ichipa mhinduro inoshanda kumatambudziko anokonzerwa nema stubs. Nekubvisa izvi zvikamu zvisingadiwe, kuchera kumashure kunowedzera kutendeseka kwechiratidzo, kunoderedza EMI, uye kunowedzera kuvimbika kwese kwedunhu. Nepo maitiro acho achisanganisira kudhura kwakanyanya uye kuoma kwehunyanzvi, mabhenefiti ayo muchiratidzo-chakakosha mashandisirwo-sekufonera, nzvimbo dzedata, aerospace, uye maindasitiri emotokari-zvinoita kuti ive yakakosha.

PaHighleap Electronic, tinopa yakakwana, imwe-stop solution yePCB nePCBA kugadzira, kusanganisira matekiniki epamusoro sekuchera kumashure. Unyanzvi hwedu hunovimbisa huchokwadi uye hunhu padanho rega rega, kubva pakugadzira kuburikidza nekugadzirwa, zvichikubvumidza kuti usangane nepamusoro-soro mukuita uye kuvimbika. Sezvo kugadzirwa kwePCB kuri kuramba kuchishanduka, Highleap Electronic iri pano kutsigira miniaturization uye yepamusoro-soro zvinodiwa zvemagetsi emazuva ano ane zvigadziriso zvemazuva ano zvinoenderana nezvaunoda.