Kukosha kweStiffeners mu2-Layer Flexible PCB Stackup

suma:

Flexible akadhindwa edunhu mabhodhi (PCBs) akashandura indasitiri yemagetsi nekugonesa compact uye inochinjika dhizaini. Ivo vanopa akawanda mabhenefiti pamusoro pevamwe vavo vakaomarara, senge yepamusoro yekupisa manejimendi, kuderedzwa uremu uye saizi, uye yakavandudzwa kuvimbika. Nekudaro, kana zvasvika kune 2-layer inochinjika PCB stack-ups, iyo inosanganisirwa yeanoomesa inova yakakosha.Mune ino blog, isu tichanyatso tarisisa kuti sei 2-layer inochinjika PCB stackups ichida stiffeners uye kukurukura kukosha kwayo mukuona kwakaringana kuita uye hupenyu hurefu.

Dzidza nezve inochinjika PCB stackup:

Tisati tapinda mukukosha kwekuomesa, isu chekutanga tinoda kunzwisisa kwakajeka kuti chii chinoshanduka PCB layup. Flexible PCB layup inoreva kurongeka kwakasiyana kwematanho akawanda mune inoshanduka redunhu bhodhi. Mune 2-layer stackup, PCB inochinjika ine zvidimbu zviviri zvemhangura zvakapatsanurwa neinochinjika insulating zvinhu (kazhinji polyimide).

Nei 2-layer inochinjika PCB stackup ichida stiffeners?

1. Mechanical rutsigiro:

Chimwe chezvikonzero chikuru nei stiffeners ichidikanwa mune 2-layer inoshanduka PCB stackup ndeyekupa rutsigiro rwemuchina. Kusiyana neakaomesesa maPCB, anochinjika maPCB anoshaya kuomarara. Kuwedzera stiffeners kunobatsira kusimbisa chimiro uye kudzivirira iyo PCB kubva pakukotama kana kuputika panguva yekubata kana kusangana. Izvi zvinonyanya kukosha kana maPCB anochinjika achiwanzopetwa kana kupetwa.

2. Wedzera kugadzikana:

Mbabvu dzinoita basa rakakosha mukusimudzira kugadzikana kweiyo 2-layer inoshanduka PCB stack-up. Nekupa kuomarara kuPCB, ivo vanobatsira kuderedza mukana wezvinetso zvinokonzeresa-dedera, senge resonance, izvo zvinogona kukanganisa kuita kwese uye kuvimbika kwedunhu. Pamusoro pezvo, zvikukutu zvinobvumira kurongeka kuri nani uye kunyoreswa panguva yegungano, kuve nechokwadi chekumisikidzwa kwezvikamu uye kubatanidza trace.

3. Rutsigiro rwechikamu:

Chimwe chikonzero chakakosha nei 2-layer flex PCB stackups ichida stiffeners ndeyekupa rutsigiro rwezvikamu. Midziyo yakawanda yemagetsi inoda surface mount technology (SMT) zvikamu kuti zvigadzirwe pamaPCB anochinjika. Kuvepo kweanoomesa kunobatsira kuparadzira kushushikana kwemagetsi kunoitwa panguva yekutengesa, kudzivirira kukuvadzwa kwezvikamu zvakaringana uye nekuona kurongeka kwavo kwakaringana pane inoshanduka substrate.

4. Kudzivirirwa kubva kune zvakatipoteredza zvinhu:

Flexible PCBs anowanzo shandiswa mumashandisirwo anoratidzwa kune yakaoma mamiriro ezvakatipoteredza, senge tembiricha yakanyanyisa, humidity, kana kuratidzwa kwemakemikari. Mbabvu dzinoita sechidziviriro chinodzivirira, kudzivirira masekete akatetepa kubva pakukuvadzwa kunokonzerwa neizvi zvakatipoteredza. Pamusoro pezvo, ivo vanobatsira kuvandudza iyo inochinjika PCB yekupokana kwese kushushikana kwemakanika uye kudzivirira hunyoro ingress, nekudaro ichiwedzera hupenyu hwayo uye kuvimbika.

5. Routing uye Signal Kutendeseka:

Mune 2-layer flex PCB stackup, chiratidzo uye magetsi anoteedzera anowanzo mhanya pane yemukati layer ye flex board. Mbabvu dziripo kuchengetedza nzvimbo yakakodzera uye kudzivirira kupindira kwemagetsi pakati pematanho emukati emhangura. Uye zvakare, ma stiffeners anodzivirira inonzwisisika yakakwira-kumhanya masaini maratidziro kubva kune crosstalk uye chiratidzo attenuation, kuve nechokwadi inodzorwa impedance uye pakupedzisira kuchengetedza redunhu chiratidzo chekuvimbika.

Mukupedzisa:

Muchidimbu, ma stiffeners chinhu chakakosha mu 2-layer inochinjika PCB stack-up sezvavanoita basa mukupa rutsigiro rwemuchina, kusimudzira kugadzikana, kupa rubatsiro rwechikamu, uye kudzivirira kubva kune zvakatipoteredza zvinhu.Vanodzivirira matunhu chaiwo, vanochengetedza kuvimbika kwechiratidzo, uye vanobvumira kuungana kwakabudirira uye kushanda kwakavimbika mumhando dzakasiyana dzekushandisa. Nekubatanidza stiffeners mumagadzirirwo ePCB anochinjika, mainjiniya anogona kuve nechokwadi chekusimba uye hupenyu hurefu hwemidziyo yavo yemagetsi uku vachinakidzwa nemabhenefiti emaseketi anochinjika.