Jiangsu Aokai New Materials, onye na-emepụta ọkachamara nke teepu okpomọkụ nke PTFE, na-enye nduzi ọkachamara. Mgbe PTFE elu-okpomọkụ teepu na-eji na-echebe PCB gold mkpịsị aka n'oge SMT mgbakọ, nrapado fọdụrụnụ (nyapade nkwụnye ego ekpe na gold mkpịsị aka mgbe teepu peeling) na nrapado nro (nrapado softens na tojuru n'okpuru elu okpomọkụ, na-emerụ echebeghị ebe ma ọ bụ PCB ebupụta) mgbe reflow soldering ma ọ bụ na-eme ka a na-emepụta ihe na-adịghị mma site na usoro nhọrọ. N'okpuru bụ nhazi usoro ngwọta:
I. Mkpọrọgwụ Mkpọrọgwụ Nyocha nke Nrapado Residue & Ọbara
1. Mgbochi nrapado Ọ na-eme mgbe ihe nrapado nwere ọdịda nchikota (ịdọka oyi akwa nrapado) ma ọ bụ ọdịda n'etiti ihu (nrapado na-apụ na mkpụrụ ma rapara na mkpịsị aka ọla edo). Ihe na-akpalitekarị gụnyere ezughị oke okpomọkụ nke teepu, nrapado merela agadi, ma ọ bụ n'oge nchacha adịghị mma.
2. Ọbara nrapado Na viscosity nke nrapado na-ada nke ọma n'okpuru nnukwu okpomọkụ na-eweghachi, na-eduga n'ịba ụba nke ukwuu. N'okpuru nrụgide lamination na ọrụ capillary, nrapado na-ejupụta n'ọnụ teepu. A na-ebutekarị nke a site na mkpuchi mkpuchi dị oke oke oke, ịrị elu okpomọkụ ngwa ngwa, ma ọ bụ nguzogide na-adịghị mma nke nrapado n'onwe ya.
II. Nhọrọ teepu kwesịrị ekwesị - Ngwọta isi
teepu PTFE nkịtị enweghị ike iru oke chọrọ nke usoro SMT. A ghaghị ịhọrọ ngwaahịa ndị emebere maka nchekwa mkpịsị aka ọla edo SMT, na-ebute ụzọ maka ịrụ ọrụ sistemu nrapado:
Ụdị nrapado
Atụmatụ
Ọnọdụ akwadoro
Ihe ndetu
Nrụgide Silicone-Nrapado nwere mmetụta (Silicone PSA)
A na-ejikarị ya eme ihe maka ire ere na-enweghị ndu
Naanị akara ngosi dị elu dị elu ka a na-anabata; Mpekere silicone dị obere ga-agbapụta ma bute mmetọ ma ọ bụghị ya.
Ihe nrapado na-enweghị silicone / Acrylic
Enweghị ihe egwu mmetọ silicon
Usoro ndị nwere mmetụta nke silicon (ọrụ eserese / mkpuchi na-esote)
Nguzogide okpomọkụ zuru oke na-ejedebe na 200-260 ° C; nyochaa nnabata oke okpomọkụ tupu ejiri ya.
Okpomọkụ Nguzogide Ọkwa : Mkpịsị aka elu okpomọkụ eguzogide ≥ 300C, na-aga n'ihu na-arụ ọrụ okpomọkụ ≥ 260°C, tere nnọọ na ọnụ ọgụgụ kasị elu okpomọkụ nke ndu-free reflow soldering (245-250°C).
Ọkpụrụkpụ Layer Adhesive : Ọkpụrụkpụ dị elu adịghị nhata nrapado siri ike karị. Kasị mma teepu nwere nha nha 0.08–0.13mm, na-egosipụta akwa nrapado dị gịrịgịrị ma dị elu iji belata ihe egwu ọbara.
· Anti-Bleed & Residue-Free Asambodo : Rịọ mgbochi-ọbara na nke fọdụrụ n'efu ule akụkọ raara nye SMT gold mkpịsị aka ndị na-ebu, na-eduzi n'ezie ọkụ ọkụ na sample.
III. Standardkpụrụ njikwa usoro nzọụkwụ isii
1. Pre-Lamination: Nchacha elu & Ọgwụgwọ tupu ọgwụgwọ
· Mwepu zuru oke: Mkpịsị aka ọla edo na ebe PCB gbara ya gburugburu ga-abụ nke enweghị ntụpọ ọsụsọ, mmetọ mmanụ na ihe fọdụrụnụ. Jiri akwa na-enweghị lint hichaa n'ime ethanol na-ekpo ọkụ ma ọ bụ mmanya isopropyl (IPA), wee kpochaa nke ọma.
Ngwa akọrọ: Gbaa mbọ hụ na PCB enweghị mmiri kpamkpam tupu ngwa teepu.
2. Lamination: Zero Tension & Ikuku zuru oke
· Unu gbatịa teepu: PTFE mkpụrụ nwere ezi ductility. Ịgbatị aka n'oge lamination na-emepụta nrụgide dị n'ime nke na-ebute mbelata n'okpuru oke okpomọkụ, na-ebute nrapado anya, ihe fọdụrụ ma ọ bụ ọbara ọgbụgba. Debe teepu ahụ n'onwe ya n'elu mkpịsị aka ọla edo wee pịa pịkụkụkụ maka nrapado mbụ.
· Mwepụ ikuku zuru oke: Jiri ihe ntugharị raara onwe ya nye ma ọ bụ scraper siri ike iji nwayọọ nwayọọ si n'etiti etiti gaa n'akụkụ abụọ maka nchịkọta zuru ezu. Gbaa mbọ hụ na adhesion ọnụ zuru oke na-enweghị afụ ikuku tọrọ atọ; afụ na-agbasa n'okpuru okpomọkụ na-ebuli akụkụ teepu, na-eme ka nrapado jujue.
Ndozi ziri ezi : Kpọkọta ọnụ teepu na-eji akụkụ mkpịsị aka ọla edo ma ọ bụ tinye ntakịrị site na 0.2–0.5mm (ọ bụrụ na ikike imewe nwere). Ekpuchila paịlị ma ọ bụ vias, n'ihi na siphonage capillary ga-adọta nrapado gbazere n'èzí.
3. Reflow soldering: welie okpomọkụ profaịlụ
· Soro nkọwapụta ọnọdụ okpomọkụ nke teepu: Tulee okpomoku elu ụlọ n'ezie iji kwe nkwa okpomọkụ kacha elu yana ngụkọta oge okpomọkụ ịnọ n'ime oke nnabata nke teepu.
· Mgbakọ ọkụ dị nro: Jikwaa ọkụ ọkụ ngwa ngwa (<2°C/s) tupu ị rute mpaghara nro nro nke nrapado (150°C-200°C). Okpomọkụ dị nkọ na mberede na-eme ka nrapado daa ma daa viscosity ya, na-eduga n'ọbara ọbara siri ike.
4. Oge nchacha: Ncha oyi na-enye nsonaazụ kacha mma
Jọ jụụ nke ọma ruo n'ọnụ ụlọ: Mgbe erechara, chere ruo mgbe PCB okpomọkụ dara n'okpuru 50°C (nke kacha mma ọnọdụ okpomọkụ) tupu ịpụpụ teepu ahụ. Nrapado na-anọgide na-adị nro na obere njikọ na oke okpomọkụ; mmanye na-ekpo ọkụ peeling mfe na-akpata oyi akwa nkewa na fọdụrụnụ gluu.
· Usoro peeling: Bee nwayọọ nwayọọ n'akụkụ 180º dị ala na ike otu. Adọpụla ya nke ọma ma ọ bụrụ na-ezute nguzogide.
5. Usoro njikwa: Control Shelf Life & Reuse Cycles
Tinye ma hazie ozugbo: PCB nwere teepu laminated kwesịrị ịbanye n'ọkụ reflow ozugbo. Zere nchekwa ogologo oge (ihe karịrị awa 24) n'ime nkuzi ahụ iji gbochie mmịpụta mmiri na nchịkọta uzuzu.
· Otu eji naanị maka ngafe ọkụ: SMT teepu okpomoku dị elu bụ ihe a na-atụfu ya. Ọbụlagodi na teepu ahụ na-egosi na emebibeghị mgbe otu ọkụ gafechara, nrapado ahụ abanyela na njikọ na ịka nká; okirikiri kpo oku nke abụọ ga-eme ka ihe fọdụrụ na nrapado ma ọ bụ ọdịda adhesion kwụsị. Maka PCB ndị nwere akụkụ abụọ, dochie ya na teepu ọhụrụ tupu ịhazi akụkụ nke abụọ ka ngafe nke mbụ gasịrị.
6. Ijikwa ihe mberede & nkwado ọdịda ọdịda
Obere ihe mkpofu glu: Kwụsị mmepụta ozugbo achọpụtara ihe fọdụrụ. Jiri nwayọ hichaa akwa akwa na-enweghị IPA; zipu mbadamba maka nhicha ọkachamara n'ọnọdụ siri ike. Ejila ngwá ọrụ siri ike kpụchaa ya.
· Nkwado ntozu teepu ọhụrụ: Jiri 1:1 PCB rụọ ọrụ nnwale zuru oke. Mgbe ọkụ gafechara, bee teepu ahụ wee lelee ebe mkpịsị aka ọla edo dị n'okpuru ihe ngosi 40-50x iji gosi na ihe fọdụrụ efu na nrapado efu na-eruju.
Anyị na-agbaso nkà ihe ọmụma ọrụ ọkachamara na iguzosi ike n'ezi ihe mgbe nile, na-eji obi anyị dum na-enye ngwọta ụlọ ọrụ nkwụsịtụ na ọrụ ndị ahịa na-eche echiche maka ndị mmekọ niile!
