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 foil. Due to this protective foil, 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.

Presensitizing Service

We can coat boards that you supply with photoresist. The max. board size is 530 x 1160 mm, the min. board thickness is 0.3 mm. Our pre-sensitizing service includes cleaning, double sided coating in dip technology, pre-aging, optical control and protection foil. Attention: dip rim 10mm on top and drip rim of 10 mm at the bottom will reduce usable size by 20 mm on the short side (530 mm will go down to 510 mm). The rim is on request removed without charge.

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 foil. Due to this protective foil, 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.

Fotobeschichtetes Basismaterial - Bungard Elektronik GmbH & Co.KG

Standard cuttings FR4

1.5 mm 35 μm Cu	1.5 mm 70 μm Cu
210 x 300	210 x 300
200 x 250	200 x 250
150 x 250	150 x 250
160 x 233.4	160 x 233.4
150 x 200	150 x 200
125 x 175	125 x 175
100 x 160	100 x 160
75 x 100	75 x 100

Panels FR4

0.5 – 1.5 mm 18 μm Cu	0.5 - 2.5 mm 35 μm Cu	0.5 - 2.5 mm 70 μm Cu	1.5 mm 105 μm Cu	1.5 mm Blau/Schwarz 35 μm
510 x 1150 x 0.5	510 x 1150 x 0.5	510 x 1150 x 0.5	510 x 1150 x 1.5	510 x 1150 x 1.5
510 x 570 x 0.5	510 x 570 x 0.5	510 x 570 x 0.5
510 x 1150 x 0.8	510 x 1150 x 0.8	510 x 1150 x 0.8
510 x 570 x 0.8	510 x 570 x 0.8	510 x 570 x 0.8
510 x 1150 x 1.0	510 x 1150 x 1.0	510 x 1150 x 1.0
510 x 570 x 1.0	510 x 570 x 1.0	510 x 570 x 1.0
510 x 1150 x 1.5	510 x 1150 x 1.5	510 x 1150 x 1.5
510 x 570 x 1.5	510 x 570 x 1.5	510 x 570 x 1.5
	510 x 1150 x 2.0	510 x 1150 x 2.0
	510 x 570 x 2.0	510 x 570 x 2.0
	510 x 1150 x 2.5	510 x 1150 x 2.5
	510 x 570 x 2.5	510 x 570 x 2.5