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I-prototype yebhodi ye-pcb enezinhlangothi ezimbili FR4 TG140 impedance elawulwa yi-PCB

I-pcb board board prototype FR4 TG140 impedance controlled PCB Isithombe Esifakiwe
  • I-prototype yebhodi ye-pcb enezinhlangothi ezimbili FR4 TG140 impedance elawulwa yi-PCB

Incazelo emfushane:

Izinto eziyisisekelo: FR4 TG140

Ubukhulu be-PCB: 1.6+/-10% mm

Isibalo sesendlalelo: 2L

Ukuqina Kwethusi: 1/1 oz

Ukwelashwa kwendawo: HASL-LF

Imaski ye-Solder: Okuluhlaza okucwebezelayo

Isikrini sikasilika: Esimhlophe

Inqubo ekhethekile : Okujwayelekile


Imininingwane Yomkhiqizo

Omaka bomkhiqizo

Ukucaciswa komkhiqizo:

I-Base Material: I-FR4 TG140
Ubukhulu be-PCB: 1.6+/-10%mm
Ukubalwa Kwesendlalelo: 2L
Ukuqina Kwethusi: 1/1 oz
Ukwelashwa kwendawo: I-HASL-LF
Imaski ye-solder: Okuluhlaza okucwebezelayo
Isikrini sikasilika: Emhlophe
Inqubo ekhethekile : Okujwayelekile

Isicelo

Amabhodi wesifunda ane-impedance elawulwayo anezici ezilandelayo:

1. Lawula ngokuqinile inqubo yokukhiqiza yebhodi lesifunda, okuhlanganisa ukukhethwa kwezinto ezibonakalayo, izintambo eziphrintiwe, isikhala sesendlalelo, njll., ukuqinisekisa ukuzinza kwe-impedance yesekethe;

2. Sebenzisa amathuluzi athile okuklama we-PCB ukuze uqinisekise ukuthi i-impedance ihlangabezana nezidingo zokuklama;

3. Kuyo yonke i-PCB layout kanye nomzila, sebenzisa indlela emfushane futhi unciphise ukugoba ukuze uqinisekise ukuzinza kwe-impedance;

4. Nciphisa i-crossover phakathi komugqa wesignali kanye nolayini wamandla kanye nomugqa waphansi, futhi unciphise i-crosstalk kanye nokuphazanyiswa komugqa wesignali;

5. Sebenzisa ubuchwepheshe be-impedance obufanayo emugqeni wokudlulisa isignali wesivinini esiphezulu ukuze uqinisekise ukuhlanzeka nokuzinza kwesignali;

6. Sebenzisa ubuchwepheshe bokuxhuma i-interlayer ukunciphisa umsindo ohlangene kanye nemisebe ye-electromagnetic;

7. Ngokwezidingo ezihlukene ze-impedance, khetha ukujiya kongqimba olufanele, ububanzi bomugqa, isikhala somugqa kanye ne-dielectric constant;

8. Sebenzisa ithuluzi elithile lokuhlola ukwenza ukuhlolwa kwe-impedance ebhodini lesifunda ukuze uqinisekise ukuthi imingcele ye-impedance ihlangabezana nezidingo zokuklama.

Kungani ukulawula okujwayelekile kwe-impedance kungaba ukuchezuka okungu-10% kuphela?

Abangane abaningi bathemba ngempela ukuthi i-impedance ingalawulwa ibe ngu-5%, futhi ngike ngezwa nangemfuneko ye-impedance engu-2.5%.Eqinisweni, inqubo yokulawula i-impedance ingu-10% ukuphambuka, okuqinile kancane, kungafinyelela ku-8%, kunezizathu eziningi:

1, ukuchezuka kwento yepuleti ngokwayo

2. Ukuchezuka kwe-Etching phakathi nokucubungula kwe-PCB

3. Ukwenziwa kwezinga lokugeleza okubangelwa ukufakwa kwe-lamination ngesikhathi sokucutshungulwa kwe-PCB

4. Ngesivinini esiphezulu, i-roughage engaphezulu ye-copper foil, i-PP glass fiber effect, kanye nomphumela wokuhluka kwamafrikhwensi we-DF wemidiya kufanele iqonde ukuthintana.

Asetshenziswa kuphi amabhodi wesifunda anezidingo ze-impedance ngokuvamile asetshenziswa?

Amabhodi esekethe anezidingo ze-impedance avame ukusetshenziselwa ukudluliswa kwesignali yesivinini esikhulu, njengokudluliswa kwesignali yedijithali yesivinini esikhulu, ukudluliswa kwesignali yefrikhwensi yomsakazo kanye nokudluliswa kwesignali ye-millimeter wave.Lokhu kungenxa yokuthi i-impedance yebhodi lesifunda ihlobene nesivinini sokudlulisela kanye nokuzinza kwesignali.Uma idizayini ye-impedance ingenangqondo, izothinta ikhwalithi yokudlulisela yesignali futhi ibangele nokulahlekelwa kwesignali.Ngakho-ke, ezikhathini ezidinga izinga eliphezulu lokudlulisa isignali, ngokuvamile kuyadingeka ukusebenzisa amabhodi wesifunda anezidingo ze-impedance.

Imibuzo Evame Ukubuzwa

1.Yini i-impedance ku-PCB?

I-Impedance ikala ukuphikiswa kwesekethe kagesi lapho kusetshenziswa ukushintshana kwamanje kuwo.Kuyinhlanganisela ye-capacitance kanye nokungeniswa kwesekethe kagesi emazingeni aphezulu.Ukuphazamiseka kukalwa ngo-Ohms, ngokufanayo nokumelana.

2.Yini ethinta i-impedance ku-PCB?

Izinto ezimbalwa ezithinta ukulawulwa kwe-impedance ngesikhathi sokuklanywa kwe-PCB zifaka ububanzi bokulandelela, ukushuba kwethusi, ukushuba kwe-dielectric kanye ne-dielectric constant.

3.Yini ubudlelwano phakathi kwe-PCB impedance kanye nezici?

1）I-Er ilingana ngokuphambene nevelu ye-impedance

2) Ubukhulu be-dielectric bulingana nevelu ye-impedance

3）Ububanzi bomugqa buqhathaniswa ngokuphambene nevelu ye-impedance

4）Ugqinsi lwethusi lulingana ngokuphambene nenani le-impedance

5)Isikhala semigqa silingana nenani le-impedance (umehluko we-impedance)

6) Ubukhulu bokumelana ne-solder buhambisana ngokuphambene nevelu ye-impedance

4.Kungani i-impedance ibalulekile ekwakhiweni kwe-PCB?

Kuzinhlelo zokusebenza zemvamisa ephezulu ezihambisana nokuphazamiseka kokulandelelwa kwe-PCB kubalulekile ekugcineni ubuqotho bedatha nokucaca kwesignali.Uma i-impedance ye-PCB trace exhumanisa izingxenye ezimbili ingafani nokuphazamiseka kwesici sezingxenye, kungase kwenyuswe izikhathi zokushintsha ngaphakathi kwedivayisi noma isekethe.

5.Iziphi izinhlobo ezijwayelekile ze-impedance?

I-impedance ephelile, i-Differential impedance, i-Coplanar impedance kanye ne-Broadside Coupled Stripline

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