Uva umama we-solder kwaye unokuba nomfanekiso wentlama ethile okanye i-flux core. Inyani yile, yintwana ye-slang yeshishini eye yaxaka. Rhoqo, ibhekisa kwisiseko se-solder alloy okanye isithuthi sokuqala sokuhamba kwi-paste-umama udibanisa yonke enye into eyakhiwe kuyo. Olona tyhalayo ngoku alukho malunga ne-alloy ngokwayo, kodwa yonke inkqubo: ngaba singazikhulula izinto ezimbi ngaphandle kokubulala ukusebenza emgceni? Ndibone iinjineli ezininzi kakhulu zileqa idatha eluhlaza kuphela ukuze zibulawe ngokuvalelwa okanye ukungcwatywa emva kwexesha.

Iphazili yeAlloy: Ngaphaya kweLead-Free

Ngokucacileyo, i-SAC305 (Sn96.5Ag3.0Cu0.5) yaba ngumama osisiseko ongenayo i-lead. Kodwa ukuyibiza ngokuba yi-eco-friendly iyayeka kumxholo okhokelayo. Ubume bemigodi yesilivere bukhohlakele, kwaye izinga lokushisa eliphezulu (240-260 ° C eqhelekileyo) litshisa amandla amaninzi. Siye savavanya ezinye ii-alloys ezinesilivere ephantsi kunye nesilivere-free njengeenkqubo ze-Sn-Cu-Ni-Ge. Ukubanjwa? Ukumanzisa kuyacotha. Kwibhodi eshinyeneyo egqitywe yi-OSP, unokufuna umjiko ondlongo-ndlongo wokubuyekeza, othi ke ujike iprofayile eluhlaza yemathiriyeli ye-solder yonke. Sisenzo sokulinganisa.

Iprojekthi enye enomthengi owenza izinzwa zemizi-mveliso ezijolise kwi-halogen epheleleyo kunye nesilivere ephantsi. Sasebenzisa i-alloy ye-Sn-Cu-Bi. Isebenze kakuhle kwi-reflow, kodwa ngexesha elikhethiweyo le-soldering of through-hole connectors, i umama we-solder Ingxubevange ibonise ukungagcwali kakuhle komngxuma. Umahluko we-thermal mass wafunxa ubushushu, wasishiya namalungu abandayo. Kuye kwafuneka ukuba sitshintshe ubushushu bembiza yamaza kunye nesitshizi se-flux, esonyusa ukusetyenziswa kwenitrogen. Kakhulu ekunciphiseni unyawo lwekhabhoni. I-takeway? Enye ialloyi yawususa umthwalo wokusingqongileyo endaweni yokuwususa.

Emva koko kukho i-tin whisking. Ngama-alloys e-high-tin, ukuncitshiswa kudla ngokuthetha iingubo ezihambelanayo okanye ukugcwalisa-iikhemikhali ezininzi, amanyathelo enkqubo. I-eco-friendly umama we-solder akufuneki isuse ingxaki ezantsi. Ndingqiyama kwiialloys ezinezongezo ezincinci njengenickel okanye imanganese ezicinezela ukukhula kwewhisker ngokwangaphakathi, nokuba zongeza ixabiso elincinci. Yimbono yomjikelo wobomi.

Flux: IMfihlo emdaka yokungacoceki

Kulapho ileyibhile ye-eco-friendly ixhatshazwa kakhulu. Ukuguquguquka okungacocekanga kunobuhlobo kuphela ukuba ngokwenene kushiya iintsalela ezinobungozi. Uninzi lusenezivuseleli eziye zonakaliswe kukufuma. Ndikhuphe iibhodi ngaphandle kwembuyekezo yentsimi ngokukhula kwe-dendritic ngenxa yokuba intsalela eluhlaza ifunxa ukufuma. Utshintsho lokwenyani lubhekiselele kwi-bio-based okanye kwi-organic acid fluxes ephuma kwizinto ezinjengombona okanye isoyi. Iimveliso zabo zokubola zinetyhefu encinci.

Kodwa ukusebenza yinkosi. I-soy-based flux esiyivavanyayo yaba nokumanzisa okukhulu kwiipads ezintsha ze-ENIG. Nangona kunjalo, kwiibhodi ezine-oxidation encinci okanye imiba yokugcina, yawa. Ifestile yokuvula ibimxinwa kakhulu. Siye sagqiba ukudibanisa kunye ne-activator yokwenziwa ukubetha ibhalansi elungileyo. Ayinandalo ngokugqibeleleyo, kodwa izinzileyo kunezokwenziwa zamandla apheleleyo. Ngamanye amaxesha, inyathelo elibi kakhulu ukuya phambili lilo lodwa elisebenzayo.

Ukuphatha kunye nokugcinwa kuyatshintsha. Ezinye zezi zinto ziguquguqukayo zinochuku kukukhanya kwe-UV okanye zinobomi obufutshane beshelufu. Ukuba ivenkile ayiqeqeshekanga, inkunkuma yezinto eziphathekayo iyakhula. Ndikhumbula i-assembler ephakathi, into enje I-Sunnian Zitai Festener Fishaner Comment Com. kuloo hub yemveliso inkulu, inokuba nesikali sokulawula uluhlu lwempahla ngokuqinileyo. Kodwa kwivenkile encinci, ukonakaliswa kunokubulala indleko-inzuzo. I https //wwww.ziitasteners.com imodeli yolungiselelo olusebenzayo kwisiseko esigxininisiweyo semizi-mveliso iqaqambisa indlela olubaluleke ngayo uzinzo lwesixokelelwano sobonelelo ukuze kwamkeleke ezi ndlela zingenye.

Iipaste kunye neZithuthi: I-Rheology yiyo yonke into

Isithuthi esibambe umgubo we-solder kunye ne-flux sichaza ukuprinta. Iintlama ezininzi eziluhlaza zitshintsha iimoto ezisekwe kwi-solvent kwiimoto ezinyibilikayo emanzini. Ivakala kamnandi. Kodwa amanzi aphuphuma ngokukhawuleza, atshintshe i-viscosity ye-paste ngexesha lokushicilela ixesha elide. Ufumana i-stencil clogging okanye ukukhululwa kakubi. Safunda ukusebenzisa iinkqubo ezivaliweyo ze-cartridge kunye nomswakama olawulwayo kumgca, ophinda wongeza amandla ngaphezulu.

Ukuhanjiswa kobungakanani besuntswana kwimiba yesolder powder nayo. Ukuprintwa kwe-fine-pitch, udinga i-Type ye-4 okanye i-5 powder (ii-spheres ezincinci). Ukuvelisa loo mgubo ngezinye ii-alloys zihlala zisebenzisa iigesi ezahlukeneyo ze-atomization. I-nitrojeni ixhaphakile, kodwa abanye bahlola i-argon yokuphinda isetyenziswe ukunciphisa inkunkuma. Yinkqubo yenkqubo uninzi aluyiboni, kodwa yongeza kwileja yokusingqongileyo yokugqibela umama we-solder ncamathelisa.

Ulingelo olungaphumelelanga lufika engqondweni. Sazama ukuncamathisela ngesithuthi esisekwe kwiselulosi. Iprinte njengephupha kwaye yaphumelela zonke iimvavanyo ze-IPC. Kodwa kwi-reflow, ukuphuma kwegesi kwakungalindelekanga. Kwiibhodi ezinomahluko omkhulu we-thermal mass, sifumene i-voids enkulu phantsi kwee-QFNs. Isithuthi asikwazanga ukukhulula izinto eziguquguqukayo ngokutyibilikayo kwiprofayile. Buyela kwilebhu. Ibonise ukuba ukulinganisa i-rheology yeenkqubo eziqinisekisiweyo ngezixhobo ezitsha kunzima kakhulu.

Ukutshintshwa Kwenkqubo: Iindleko Zamandla Ezifihlakeleyo

I-eco-friendly material solder ayivandlakanywa kwijagi. Ivavanywa kwinkqubo enokufuna amaqondo obushushu aphezulu, iiprofayili ezinde, okanye umoya ongasebenziyo. Ukuba i-halogen-free yakho entsha, i-bio-flux paste ifuna i-10 ° C ephezulu ye-peak temp okanye i-tunnel-reflow ye-nitrogen ukukhusela i-oxidation, usanda kwandisa ukusetyenziswa kwamandla endibano kakhulu. Olo rhwebo alufane lubalwe kwibango eliluhlaza.

Senze uphicotho kumthengi. Ukutshintshela kwi-premium eco-paste kunciphisa ukukhutshwa kwe-VOC kunye neendleko zonyango lwenkunkuma. Nangona kunjalo, ukusetyenziswa kwabo kwe-nitrogen kunyuke nge-30% ukugcina isivuno, kwaye ukusebenzisa kwabo amandla e-oveni kunyuke malunga ne-8%. Inzuzo yendalo yonke ibisencumile, kodwa incinci kunendlela ecetyisiweyo yokuthengisa. Okwenyani umama we-solder Umba luhlanganiso lwenkqubo epheleleyo.

Ukusebenza kwakhona kunye nokulungiswa kuya kuba nzima ngakumbi. Ezinye ii-fluxes ezizezinye zishiya iintsalela ekunzima ukuzisusa ukuze zilungiswe ibhodi. Ukuba ufuna isinyibilikisi esinamandla ukuzicoca, ubuyele kwisikwere esinye. Ngoku sincoma ukudibanisa iipasti ezithile ze-solder kunye nezicoci ezihambelanayo, ezingenandyikityha zokuphinda zisebenze ukusuka ekuqaleni-indlela yenkqubo.

Ukufumana kunye nokuSebenza kweLizwe lokwenyani

Ekugqibeleni, imalunga namakhonkco okubonelela. Isikali selebhu esigqibeleleyo umama we-solder enye indlela ayinamsebenzi ukuba awukwazi ukufumana i-10,000kg yayo rhoqo. Izinto ezininzi ezivelisa izinto ezintsha zivela kwiikhemisti ezincinci ezingakwaziyo ukulinganisa okanye ukuqinisekisa ukufana kwe-batch-to-batch. Kumvelisi wevolumu ephezulu, ukuthembeka akunakuxoxisana.

Yiyo loo nto amaqela emveliso abalulekile. Ukuba kwindawo efana neSithili saseYongnian, eHandan, ekufuphi neendlela ezinkulu zothutho njengeBeijing-Guangzhou Railway kunye neendlela ezikhawulezayo, ayisiyonto nje yokuhambisa inqanawa. Kwinkampani efana I-Sunnian Zitai Festener Fishaner Comment Com., imalunga nokufakwa kwinethiwekhi yababoneleli bezinto eziphathekayo kunye nezixhobo ezinokuxhasa ukwamkelwa okuhambelanayo, okukhulu kwezinto ezintsha. Ukuba umthengisi wakho we-solder lusuku olukude ngendlela, unokubaleka uluhlu lwempahla kwaye uphendule ngokukhawuleza ukwenza i-tweaks.

Ukufudukela kwezinye iindlela eziluhlaza asiyonto ilula yokutshintshana. I-re-engineering of the solder mother concept-alloy, flux, isithuthi, umgubo, kunye nenkqubo abahlala kuyo. Ingcolile, igcwele ukulungelelaniswa, kwaye ifuna ukujonga ibhodi yonke, kungekhona nje ingqayi yokunamathisela. Injongo ayikobunyulu; yimpembelelo ephantsi ngokwenene ngaphandle kokuncama ukuthembeka okwenza yonke into ukusuka kwi-fastener ukuya kwi-motherboard yomncedisi isebenze ngokwenene.