Ibhodi ye-pcb emacala amabini iprototype FR4 TG140 impedance elawulwayo PCB

Iibhodi zesekethe ezine-impedance elawulwayo zinezi mpawu zilandelayo:

1. Ukulawula ngokungqongqo inkqubo yokuvelisa ibhodi yesekethe, kubandakanywa nokukhethwa kwezinto, i-wiring eprintiweyo, isithuba se-layer spacing, njl., Ukuqinisekisa ukuzinza kwe-impedance yesekethe;

2. Sebenzisa izixhobo ezithile zoyilo zePCB ukuqinisekisa ukuba i-impedance ihlangabezana neemfuno zoyilo;

3. Kuyo yonke i-PCB layout kunye nomzila, sebenzisa eyona ndlela imfutshane kunye nokunciphisa ukugoba ukuqinisekisa ukuzinza kwe-impedance;

4. Ukunciphisa i-crossover phakathi komgca wesignali kunye nomgca wamandla kunye nomgca womhlaba, kwaye unciphise i-crosstalk kunye nokuphazamiseka komgca wesignali;

5. Sebenzisa iteknoloji ye-impedance ehambelanayo kwi-high-speed signal transmission line ukuqinisekisa ukucoceka kunye nokuzinza kwesignali;

6. Sebenzisa itekhnoloji yonxibelelwano lwe-interlayer ukunciphisa ingxolo yokudibanisa kunye nemitha ye-electromagnetic;

7. Ngokweemfuno ezahlukeneyo ze-impedance, khetha ubukhulu obufanelekileyo bomaleko, ububanzi bomgca, isithuba somgca kunye ne-dielectric constant;

8. Sebenzisa isixhobo esithile sokuvavanya ukwenza uvavanyo lwe-impedance kwibhodi yesekethe ukuqinisekisa ukuba i-impedance parameters ihlangabezana neemfuno zoyilo.

Kutheni le nto ulawulo lwe-impedance oluqhelekileyo lunokuba luphambuko lwe-10% kuphela?

Abahlobo abaninzi banethemba lokwenene lokuba i-impedance inokulawulwa ukuya kwi-5%, kwaye ndikhe ndeva nge-2.5% imfuneko yokuphazamiseka.Ngapha koko, indlela yokulawula i-impedance yi-10% yokutenxa, ingqongqo ngakumbi, inokufikelela kwi-8%, kukho izizathu ezininzi:

I-1, ukuphambuka kwezinto zeplate ngokwayo

2. ukutenxa ukutenxa ngexesha PCB processing

3. I-iation of flow rate ebangelwa yi-lamination ngexesha lokusetyenzwa kwePCB

4. Ngesantya esiphezulu, i-roughage yomphezulu wefoyile yobhedu, iPP glass fiber effect, kunye ne-DF frequency variable effect of media kufuneka iqonde i-impedance.

Ziphi iibhodi zeesekethe ezineemfuno ze-impedance ezisetyenziswa ngokubanzi?

Iibhodi zesekethe ezineemfuno zokuthintela zidla ngokusetyenziselwa ukuhanjiswa komqondiso wesantya esiphezulu, ezifana nesantya esiphezulu sokuhanjiswa komqondiso wedijithali, ukuhanjiswa komqondiso werediyo kunye nokuhanjiswa komqondiso wemilimitha.Oku kungenxa yokuba i-impedance yebhodi yesekethe ihambelana nesantya sokuhambisa kunye nokuzinza komqondiso.Ukuba uyilo lwe-impedance alunangqiqo, luya kuchaphazela umgangatho wokuhanjiswa kwesignali kwaye kubangele ukulahlekelwa kwesignali.Ngoko ke, kwiimeko ezifuna umgangatho ophezulu wokuhambisa umqondiso, ngokuqhelekileyo kuyimfuneko ukusebenzisa iibhodi zeesekethe ezineemfuno ze-impedance.