160x100mm Photo EP Plaket (BEP160100A1)

A value concept for quality.

Our special quality can be measured in the following facts:

We use first-choice laminates approved and certified by UL, NEMA, DIN, IEC and others.

Several types of laminates such as FR2, FR3, CEM1, FR4 and PTFE are available in different thicknesses and copper clads. FR 4 e.g is available in thicknesses of 0.5, 0.8, 1.0, 1.6, 2.0 and 2.5 mm with either 18, 35 or 70 microns Copper. The max. panel size is 510 x 1150 mm. Our cutting service provides sheets down to 50 x 50 mm min. size, with an accuracy of 0.1 mm.

Photoresist

We coat the laminates with a special positive working liquid resist made after our own recipe. The resist features highest exposure sensitivity, short processing turns and large safety tolerannces. The equal and dust-free coating has a defined thickness of 5 µm. The maximum spectral response is in the range of 350 - 400 nm. The line resolution is limited only by the type of exposure unit. Typical exposure times are less than 90 secondes on our exposure unit HELLAS with fluorescent vacuum tubes. The resist allows multiple exposure.

Referring to our special developer, at 20 °C the developing time is less than 45 secondes. On the other hand, the resist is absolutely stable for more than 5 minutes in the developer. It is resistant to acid etching or galvanic chemicals and even permits alcaline etching at a ph less than 9.5.

The boards are protected against mechanical damage and unwanted exposure by a special, blue coloured adhesive paper. Due to this protective paper, no flitters appear when cutting or milling the boards.

Each board is subjected to chemical and physical controls and tests before and after coating.

A shelf live of more than 1 year under normal storage conditions is guaranteed. Even 10 year old boards still work.