Kunzwisisa Iyo Yakakosha FR4 Temperature Rating kune Yako PCB Projects

Nhanganyaya yeFR4

Pakati pezvinhu zvakawanda zvinoshandiswa pakugadzira PCB , FR4 inoonekwa seyero yepamusoro. Chinhu ichi chinowanikwa kwose kwose chinobva pakusanganiswa kwezvinhu zvinodiwa: kuputira magetsi, kugara kwenguva refu, uye chinonyanya kukosha, kutsungirira kupisa kunoshamisa. Izwi rekuti "FR4" rinoreva mhando ye epoxy laminate inodzivirira moto, yakasimbiswa negirazi. Kunzwisisa chiyero chekupisa kweFR4 kwakakosha kune mainjiniya nevagadziri, sezvo kuchikanganisa kugara kwenguva refu, kushanda zvakanaka, uye pakupedzisira, kubudirira kwemidziyo yemagetsi.

FR4 Temperature Rating

Chinonyanya kukosha pakugadzirwa kwePCB ndere tembiricha yeFR4. Iyi chiyero chakakosha, sezvo ichitsanangura tembiricha yepamusoro inogona kumiriswa nechinhu cheFR4 chisati chatanga kuora kana kuti kuderera kwesimba rayo remagetsi. Tembiricha yakajairika yeFR4 inowanzoita 130°C, asi pane misiyano zvichienderana nechimiro chaicho nemugadziri.

Iyo tembiricha chiyero cheFR4 inotemerwa kuburikidza nekuomesesa kuyedzwa, kusanganisira iyo Nguva yeDelamination bvunzo, iyo inoyera iyo nguva FR4 inogona kumira tembiricha isati yatanga kuderera. Imwe bvunzo yakakosha ndeyeGirazi Shanduko Temperature (Tg), iyo inoratidza tembiricha painochinjika zvinhu kubva payakaomarara kuenda kune imwe fomu inobatika. Yepamusoro Tg maitiro anoratidza zvirinani kupisa kwekupisa, zvichiita kuti PCB iwedzere kuenderana nepamusoro-tembiricha application.

Zvinhu Zvinokonzera FR4 Temperature Tolerance

Kushivirira kupisa kweFR4 hakusi chinhu chechinhu chacho chete asi kunokonzerwa nezvinhu zvakasiyana-siyana. Kunzwisisa zvinhu izvi kwakakosha kune vagadziri vePCB nemainjiniya, sezvo zvichibvumira sarudzo dzine ruzivo rwakadzama panguva yekugadzira nekugadzira PCB . Pano, tinoongorora zvinhu zvakakosha zvinokanganisa kushivirira kupisa kweFR4.

Kuumbwa uye Hunhu hweFR4

Kuumbwa kweFR4 kunobata basa rakakosha mukushivirira kwayo kwekupisa. FR4 chinhu chinoumbwa chakagadzirwa kubva kune yakarukwa fiberglass jira rine epoxy resin binder. Hunhu hwezvinhu izvi, kunyanya kupisa kweresin uye jira rekuruka, rinogona kukanganisa zvakanyanya kushivirira kwekushisa kwebhodhi. Yepamusoro-mhando resins ine yakanyanya kupisa kupisa inogona kuwedzera iyo FR4 kugona kumira tembiricha yepamusoro.

Ukobvu hwePCB

Ukobvu hwePCB hunokanganisawo maitiro ayo ekupisa. Mabhodhi akakora anogona kupa zvirinani kupisa kupisa, kugovera kupisa zvakanyanya zvakaenzana uye kudzivirira hotspots. Nekudaro, mabhodhi akakora anogona zvakare kureva nzira dzekupisa dzakarebesa, izvo zvingaite zvishoma mune mamwe mamiriro. Kuwana chiyero chakakodzera maererano nezvinodiwa zvechishandiso chekushisa ndicho chinhu chakakosha pakugadzirisa mashandiro.

Copper Tracing uye Layout

Mhangura yemhangura paPCB inoita basa rehuviri mukutonga kwekupisa. Kune rumwe rutivi, mhangura ndiyo yakanakisa conductor yekupisa, iyo inogona kubatsira mukubvisa kupisa kubva kune zvakakosha zvinoriumba. Kune rimwe divi, saizi uye marongero ezviteshi izvi zvinogona kugadzira mabhodhoro ekupisa, zvichitungamira mukudziya kwenzvimbo. Strategic dhizaini, kusanganisira kushandiswa kwekudziya vias uye nekungwarira kuiswa kwezvikamu, zvinogona kudzikisira nyaya idzi.

External Environmental Conditions

Nzvimbo yekushanda inokanganisa zvakanyanya kushivirira kwekupisa kweFR4. Ambient tembiricha, kuyerera kwemhepo, uye kuvapo kwezvimwe zvinogadzira-zvinopisa zvinokonzeresa zvese zvinokonzeresa kuzara kwekupisa paPCB. Zvishandiso zvakagadzirirwa nharaunda dzakaomarara kana nzvimbo dzakavharirwa, uko kutonhora kuri kushoma, zvinoda kutariswa kwakakosha kuti ive nechokwadi chekuti tembiricha yeFR4 haina kupfuurwa.

Manufacturing Process

Chekupedzisira, iyo nzira yekugadzira pachayo inogona kukanganisa kupisa kwekushivirira kweFR4. Kusiyanisa panguva yekutsikirira, tembiricha, uye maitiro ekurapa epoxy resin zvinogona kutungamira kune mutsauko mukuwanda kwechinhu uye zvimiro zvekupisa. Kuenderana uye kudzora kwemhando panguva yekugadzira kwakakosha kuve nechokwadi kuti FR4 inosangana neyakatsanangurwa tembiricha chiyero.

Zvinoreva Kupfuura FR4 Temperature Ratings

Kuenda kunze kweyakatemerwa tembiricha miganho yeFR4 inogona kutungamira kune yakakosha mhedzisiro yePCBs. Kutendeseka kwebhodhi redunhu rakadhindwa kunotsamira pakukwanisa kwezvikamu zvaro kushingirira kushushikana kwekushanda, kusanganisira matambudziko ekupisa. Kana tembiricha yeFR4 yadarika, nhevedzano yezvinokuvadza inogona kuitika, ichikanganisa kushanda kwePCB uye hupenyu hurefu. Ichi chikamu chinoongorora njodzi dzinogona kuitika uye kwenguva refu zvinokonzeresa zvekushanda kupfuura FR4 yekupisa simba.

Ngozi dzeThermal Overload

Iyo njodzi yekukurumidza yekupfuura iyo FR4 tembiricha chiyero ndiko kudzikira kwemuviri kwePCB. Kupisa kwakanyanya kunogona kukonzera epoxy resin mukati meFR4 zvinhu kupfava kana kutoora, zvichitungamira mukudonha. Uku kupatsanurwa kwema laminate layers kunogona kukonzera kuputsika maseketi uye kukanganisa kuvimbika kwemagetsi. Uyezve, kuwedzera kwezvinhu pamitengo yakasiyana pasi petembiricha yakakwira kunogona kutungamira kune kushushikana kwemagetsi, kukonzeresa warping kana kukotama kwePCB.

Impact paMafambiro eMagetsi

Thermal overload haingokonzeri tyisidziro yemuviri; inokanganisawo kushanda kwemagetsi kwePCB. Sezvo kutonhora kuchikwira, conductivity yemhangura yemhangura inogona kuderera, zvichiita kuti kuwedzerwa kwemagetsi kupikisa. Shanduko iyi inogona kukanganisa kutendeseka kwechiratidzo, zvichikonzera ruzha, kunonoka, kana kurasikirwa kwechiratidzo. Zvikamu zvinonzwa nekushanduka kwetembiricha zvinogona kutadza kushanda nemazvo, zvichizotungamira kumaitiro akashata kana kutadza zvachose kwechigadzirwa chemagetsi.

Kuvimbika Kwenguva Yakareba Kunetseka

Kuvimbika kwenguva refu kwemidziyo yemagetsi kwakakosha, uye kushanda mukati meiyo FR4 tembiricha yakatarwa ndiko kwakakosha pakuona kuvimbika uku. Kuramba kuratidzwa kwekupisa kwakanyanya kunogona kukurumidza kuchembera kwePCB, zvichitungamira mukutadza nguva isati yakwana. Iko kupisa kwebhasikoro pakati pekushisa kwepamusoro uye kwakaderera kunogona kuwedzera kuneta kwezvinhu, zvichiwedzera kuderedza hupenyu hwePCB. Zvishandiso zvakagadzirirwa maapplication akakosha kana kushandiswa kwenguva refu hazvigone kugonesa zvakadaro mukuvimbika.