Trong flex PCB, do tin cay khong chi phu thuoc vao dong va polyimide. Viec co hay khong co lop keo o giua con anh huong truc tiep den do day tong, ung suat khi uon, do on dinh nhiet va do chinh xac kich thuoc. Vi vay, ket cau khong keo va co keo khong nen duoc xem la giong nhau.
Voi flex PCB khong keo, dong duoc lien ket truc tiep voi phim polyimide. Voi cau truc co keo, se co them lop lien ket o giua. Su khac biet nay dac biet quan trong trong ung dung uon lap lai, stackup rat mong va cac vung chuyen tiep rigid-flex chat hep.
Khi nao nen uu tien ket cau khong keo
- uon dong lap lai nhieu lan
- stackup rat mong
- can do on dinh kich thuoc cao
- thiet ke rigid-flex khat khe
Do day nho hon thuong dong nghia voi bien dang tren dong thap hon. Dieu nay lien quan truc tiep den huong dan ban kinh uon.
So sanh nhanh
| Yeu to | Khong keo | Co keo |
|---|---|---|
| Do day | nho hon | lon hon |
| Tuoi tho uon | tot hon | thap hon |
| On dinh nhiet | tot hon | no gian nhieu hon |
| On dinh kich thuoc | tot hon | thap hon |
| Chi phi | cao hon | thap hon |
| Nguon cung | hep hon | rong hon |
Tuy vay, flex PCB co keo van rat hop ly cho cac nep gap tinh, ket noi noi bo don gian va du an nhay cam ve gia.
Lua chon theo ung dung
| Ung dung | Huong uu tien |
|---|---|
| cam bien deo tren nguoi | khong keo |
| module camera | khong keo |
| FPC noi bo don gian | co keo |
| rigid-flex mong | khong keo |
| nep gap tinh tren o to | tuy bien do |
Ban co the xem them huong dan vat lieu, quy trinh san xuat va flex PCB vs rigid-flex PCB.
"Trong flex dong, lop keo khong phai chi la chi tiet mua hang. No la mot phan cua bai toan met moi cua dong."
— Hommer Zhao, Engineering Director at FlexiPCB
FAQ
Khong keo co phai luc nao cung tot hon?
Khong. Thuong tot hon cho thiet ke mong va dong, nhung khong phai luc nao cung can cho ung dung tinh.
Co cai thien ban kinh uon khong?
Thuong co, vi tong do day giam xuong.
Flex co keo co chat luong thap hon khong?
Khong. Day chi la mot cau truc khac phu hop voi yeu cau khac.
Rigid-flex thi nen chon gi?
Thuong uu tien khong keo, nhat la voi cac chuyen tiep mong va chinh xac.
Nguon ngoai nao huu ich?
Polyimide va IPC la cac tai lieu nen bat dau.
Neu muon ra soat stackup, hay lien he chung toi hoac yeu cau bao gia.
