FAQ - Frequently Asked Questions

For the most circuit boards you can use our online circuit board calculator to generate an offer and to order. For special circuit boards, please use our request form for special production circuit boards.

For SMD stencils, please use the order form for SMD stencils.

For toroidal transformers, please use the request form for toroidal transformers or the order form for toroidal transformers.

You can attach your circuit board data with the online circuit board calculator during the order process.

You can attach your SMD stencil data with the Order form for SMD stencils during the order process.

Please send data for special enquiries or for toroidal transformers by email or use our data upload form.

We solely process digital data (e.g. GERBER data and drill hole data).

We prefer to process data in ODB++ and Extended GERBER formats. We can also import your data from the following programs:

• EAGLE
• Target 3001
• Sprint Layout

If you send us standard GERBER data, we will also need the additional D-Code table(s) and drill hole data, preferably in Excellon format; but all other popular formats are also acceptable, of course.

If you make use of our cost-free data import (from EAGLE, Target, etc.), we only export the standard layers. Custom layers used must be explicitely stated in written form. Please note also our Design-Aid for EAGLE-Users.

We prepare and optimise your data for the production process:

a) We crop the copper at the PCB edges (shaving):

• 200µm spacing to milling edges
• 500µm spacing to scoring edges
• 200µm circular for npth drills

Note: Short-circuits are avoided if the PCBs are to be inserted into conductive housings, avoidance of injuries and better durability of the boards.

b) Scale-up of the solder-stop mask:
When solder-stop is applied, a certain production tolerance and thus a small offset to the conductive pattern is possible. To prevent your pads from being overprinted by solderstop, we scale-up the pad`s clearance (if necessary) 50-125µm, depending on the design.

c) Optimisation of the marking print in relation to the pads (clipp-off):
The marking print is cropped for 100µm from the solder-stop mask. This is necessary, as overprinted solder-pads give solderability problems.

d) Font width of the marking print:
The font width of the marking print will be scaled up to a minimum of 150-180µm (design related), otherwise the marking print is to small, blurry or non-existent.

The manufacturing time does not begin until all documents necessary for production have been submitted completely. The current (partial) day is counted only when the circuit board data/documentation has been presented to us before 9:00 am CET or CEST, respectively.

If not stated explicitly, the given prices for printed circuit boards refer to:

• min. conductor trace -width / -spacing: 150µm (6mil) and
• min. via diameter: 300µm (12mil)

as well as a production according to IPC-A-600G Class 2.

All base materials used in the circuit boards and all available final surfaces for the circuit boards are RoHS compliant (with the exception of HAL lead-tin (SnPb)).

Our toroidal transformers and SMD stencils are also RoHS compliant.

During the E-Test, a network list is generated on the basis of the data provided by the customer. This network list displays all connection routes from parts and connection points. After the circuit boards have been manufactured, electric voltage is applied to these connections with testing probes. This ensures that short circuits or open conductor traces can be identified and localized, guaranteeing the functionality of the circuit boards.

Multi CB Ltd. delivers exclusively to business customers according to Paragraph §14 BGB of the German Legal Code.

Shipping is handled by UPS, or by customer pickup. If you have selected express service for the manufacture of your order (Express), then shipping occurs via UPS Express Saver by default, unless otherwise requested. See shipping costs and options.

Customers within Germany may pay in advance or be billed with an invoice. International customers are expected to pay for the first order in advance, and can thereafter switch to payment per invoice.

Please inform us as quickly as possible in case of any problem that may necessitate a return. We always strive to reach an equitable and non-bureaucratic cooperative solution. Please observe that complaints can be honoured only in relation to the actual product as ordered. In cases where the complaint is justified, we will deliver corrected items as soon as possible.