Muchokwadi, PCB warping inorevawo kukotama kwebhodhi redunhu, iro rinoreva iyo yekutanga flat redunhu bhodhi. Kana yaiswa padesktop, iyo migumo miviri kana yepakati pebhodhi inoratidzika zvishoma kumusoro. Ichi chiitiko chinozivikanwa sePCB warping muindasitiri.
Nzira yekuverenga warpage yebhodhi redunhu ndeyekuisa bhodhi redunhu rakatsetseka patafura nemakona mana ebhodhi redunhu pasi uye kuyera kureba kwearch pakati. Iyo formula ndeyotevera:
Warpage = kureba kwearch / kureba kwePCB refu side *100%.
Circuit board warpage industry standard: Zvinoenderana neIPC — 6012 (1996 edition) “Matsanangudzo eKuzivikanwa uye Kuita kweRigid Printed Boards”, iyo yakanyanya warpage uye kukanganisa kunobvumirwa kugadzirwa kwemabhodhi edunhu iri pakati pe0.75% ne1.5%. Nekuda kweakasiyana maitiro ekuita fekitori yega yega, kune zvakare mimwe misiyano muPCB warpage control zvinodiwa. Nokuti 1.6 bhodhi gobvu kwakajairika kaviri-sided multilayer redunhu mapuranga, vakawanda redunhu bhodhi vagadziri vanodzora PCB warpage pakati 0.70-0.75%, vakawanda SMT, BGA mapuranga, zvinodiwa mukati siyana 0.5%, mamwe redunhu bhodhi mafekitari ane simba muitiro simba anogona kusimudza. iyo PCB warpage standard kusvika 0.3%.
Nzira yekudzivirira sei kuputika kwebhodhi redunhu panguva yekugadzira?
(1)Iyo semi-yakaporeswa kurongeka pakati pechikamu chimwe nechimwe kunofanirwa kuenzana, chikamu chezvikamu zvitanhatu zvemapuranga edunhu, ukobvu huri pakati pe1-2 uye 5-6 zvidimbu uye huwandu hwezvidimbu zvakaporeswa zvinofanirwa kuenderana;
(2)Multi-layer PCB musimboti bhodhi uye pepa rekurapa rinofanira kushandisa zvigadzirwa zvemupi mumwe chete;
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Nzira yekudzivirira sei circuit board warping?
1.Engineering dhizaini: interlayer semi-curing sheet kuronga kunofanirwa kuve kwakakodzera; Multilayer core board uye semi-cured sheet ichagadzirwa kubva kumutengesi mumwechete; Iyo graphic nzvimbo yekunze C / S ndege iri padyo sezvinobvira, uye yakazvimirira grid inogona kushandiswa.
2.Drying ndiro isati yavhara: kazhinji 150 madhigirii 6-10 maawa, kusabvisa mhute yemvura mundiro, wedzera kuita kuti resin irape zvachose, kubvisa kushungurudzika mundiro; Pepa rekubikira risati ravhurwa, zvese zviri zviviri zvemukati uye mativi maviri zvinoda!
3.Pamberi pe laminates, kutarisa kunofanira kubhadharwa kune warp uye weft kutungamira kweplate yakasimbiswa: iyo warp uye weft shrinkage ratio haina kufanana, uye kuchenjerera kunofanira kubhadharwa kusiyanisa warp uye weft kutungamira pamberi pelaminating semi-solidified sheet; Iyo yepakati ndiro inofanirawo kuterera kune kutungamira kwe warp uye weft; Iyo yakajairika nzira yeplate yekurapa pepa ndiyo meridian kutungamira; Iyo yakareba nzira yemhangura yakavhara ndiro ndeye meridional; 10 akaturikidzana e4OZ simba gobvu pepa remhangura
4.ukobvu hwelamination kuti ubvise kushushikana mushure mekutonhora kudzvanya, kuchekerera mupendero mbishi;
5.Baking plate isati yachera: 150 degrees kwemaawa mana;
6.Zviri nani kuti usapfuure ne mechanical grinding brush, kemikari yekuchenesa inokurudzirwa; Special fixture inoshandiswa kudzivirira ndiro kubva pakukotama nekupeta
7.After spraying tini pamusoro flat marble kana simbi ndiro dzinongoitika kutonhora kusvika kamuri tembiricha kana mhepo inoyangarara mubhedha kutonhora pashure kuchenesa;
