Ingxenye 2 Izindlela Ezijwayelekile ZOKUKHOMBA kwezingxenye ze-SMT ze-polar

6. Integrated Circuit
6.1 Ukupakishwa kohlobo lwe-SOIC kune-polarity.Izimpawu ze-polarity :1) iribhoni, 2) uphawu, 3) amanotshi nemisele, 4) i-bevel
6.2 IPHAKEJI lohlobo lwe-SOP noma lwe-QFP linobumbano.I-Polarity ibhalwe :1) inotshi/umsele obhalwe ukuthi, 2) Iphuzu elilodwa lihlukile (usayizi/umumo) kwamanye amaphuzu amabili/amathathu.
6.3 QFN uhlobo encapsulation has polarity.I-polarity ibonisiwe :1) iphuzu elilodwa lihlukile kwamanye amaphuzu amabili (usayizi/umumo), 2) i-hypotenuse ebonisiwe, 3) uphawu olubonisiwe (ibha/” + “uphawu/ichashazi).

7. I-Ball Grid Array
7.1 Ingxenye ye-polarity: notch/groove/chashaza/indingilizi;I-polarity yebhodi le-PCB: indilinga/ichashazi/uhlamvu “1 noma A”/umaka we-bevel.Iphoyinti le-polarity lengxenye lihambisana nephoyinti le-polarity ku-PCB.Indlela yokuhlonza ukumelana ne-SMT
Ngokuvamile, kunemibala engu-12 yokumelana nendandatho yombala: onsundu, obomvu, osawolintshi, ophuzi, oluhlaza okotshani, oluhlaza okwesibhakabhaka, onsomi, ompunga, omhlophe, omnyama, ogolide nesiliva.Phakathi kwayo, imibala eyishumi yokuqala imele u-1~9(omnyama umele u-0), futhi igolide nesiliva ngokulandelana kwazo zimelela izinhlobo ezimbili zamaphutha (hlanganisa noma khipha 5% futhi plus noma khipha 10%).

Imibala emibili yokuqala imelela izinombolo ezimsulwa.Isibonelo, okuwolintshi nokumnyama kumelela inombolo engu-30 (ayisho ukuthi ukumelana nama-euro angama-30), futhi indandatho yesithathu yombala imele inani loziro.Isibonelo, uma indandatho yesithathu yombala ibomvu, kusho inombolo engu-30 ilandelwa ama-zero amabili, futhi inani lokumelana lalokhu kumelana liyi-30 00 euro (3k euros).

Indandatho yokugcina yombala igolide noma isiliva.Isibonelo, uma indandatho yokugcina yombala iyisiliva, ukumelana kokumelana kuzoba phakathi kuka-3000 ohms plus noma susa u-10% (ukumelana kwangempela kokumelana kuzoba yinoma yiliphi inani eliqondile ngaphakathi kwalolu hlu).

I-SMT capacitance polarity ukwahlulela kanye nokuhlonza umthamo

I-Capacitor ihlukaniswe ikakhulukazi i-electrolytic capacitor kanye ne-wafer capacitor.Ukuma kwe-electrolytic capacitor iyisilinda, futhi indawo yayo yesilinda imakwe ngosayizi wayo we-capacitance, futhi ine-polarity (unyawo olude luyisigxobo esihle, unyawo olufushane luyisigxobo esibi).

Ngakolunye uhlangothi, i-wafer capacitance ayinayo i-polarity.Ngokuvamile imise okwendingilizi futhi imakwe ngezinombolo ezintathu, phakathi kwazo amadijithi okuqala neyesibili amele inani le-capacitance futhi idijithi yesithathu imele inani lama-zero, afana no-233, omelela inani le-capacitance lika-23000PF noma i-micromethod engu-0.023.

I-NeoDen ihlinzeka ngezixazululo zomugqa womhlangano we-SMT ogcwele, okuhlanganisa i-oven reflow ye-SMT, umshini wokunamathisela amaza, umshini wokukhetha nendawo, iphrinta yokunamathisela ye-solder, ihhavini ye-Reflow, isilayishi se-PCB, isilayishi se-PCB, isiqhumiso se-chip, umshini we-SMT AOI, umshini we-SMT SPI, i-SMT X- Umshini weRay, okokusebenza komugqa womhlangano we-SMT, Izisetshenziswa zokukhiqiza ze-PCB SMT izingxenye eziyisipele, njll.

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