Product Information “Flexible PCBs on Aluminium”
The use of LEDs in the automotive industry and in lighting in buildings has posed new challenges in the shape and design of printed circuit boards. When installing LEDs in front headlights, for example, the printed circuit board is bonded to an aluminium heat sink to which the LEDs are then attached. The printed circuit boards offered by AT&S have either one, two or three layers (HDI).
AT&S offers the following options:
- Aluminium or copper heat sinks
- Available with thermally conductive bonding material or prepreg (0.3-3.0 W/(m•K))
- Available in punched version, or routed
Technology Sheet
| Capabilities | Standard Production | Advanced Production |
|---|---|---|
| Layer Count / Technology | Single Sided - 2 Layer PCB | Single Sided - 3 Layer |
| PCB Thickness Range | 75µm - 800µm (including Stiffner) | 50µm - 1200µm (including Stiffner) |
| Materials | Polyimide | Polyimide |
| Thinnest Core | 50µm without Adhesive | 25µm without Adhesive |
| Copper Thickness | 9µm / 12µm / 18µm / 35µm | 9µm / 12µm / 18µm / 35µm |
| Copper Plating Holes | 20µm (25µm) | 13µm / 20µm / 25µm |
| Min. Line / Spacing | 125µm / 125µm | 65µm / 65µm (LDI) |
| Soldermask Registration | +/- 100µm (Photoimageable) | +/- 50µm (Photoimageable) |
| Min. Soldermask Dam | 100µm | 65µm |
| Soldermask Color | Amber (green) | Amber (green) |
| Cover Layer Polyimide | Laser cutting / punching / drilled | Laser cutting / punching / drilled |
| Production Panel | 609.6 mm x 457.2 mm 250 mm x (250 - 410 mm) | 609.6 mm x 457.2 mm 250 mm x (250 - 410 mm) |
| Min. Annular Ring | 150µm | 150µm |
| Smallest Drill | 0.28 mm | 0.2 mm |
| Smallest Routing Bit | 0.8 mm | 0.8 mm |
| Surfaces | OSP / Immersion Tin Immersion Ni/Au Plated Ni/Au | OSP / Immersion Tin Immersion Ni/Au Plated Ni/Au |
| ID Print | White | White |
| Adhesive Tape | Yes | Yes |
| SMT Service | Yes | Yes |
| Stiffner Material | FR4 / Steel / Aluminium | FR4 / Steel / Aluminium |