Newbury Electronics Ltd

Multi Layer PCBs

We hold stocks of a wide variety of rigid and pre-preg materials sufficient to construct all manner of bespoke multi-layer builds.  We are happy to quote.However, we recommend that you consider using the builds shown below, being our standard multi-layer constructions for 4, 6, 8, 10, and 12 layer multi-layer PCBs.

The benefits of these builds are:

• economy by use of standard stock materials
• uniform spacing between layers
• adequate insulation gaps in the “Z” axis to ensure that copper tracking remains isolated between layers after pressing
• symmetry to avoid bow and twist

Our multi-layer production process benefits from the following features:

• Press platens are heated by means of circulated “hot-oil” ensuring no localised hot-spots in the bonding process minimising the risk of bow and warpage.
• Lamination under vacuum eliminating air-entrapment
• X-ray drilled PTH holes ensuring optimum registration of drilled holes to copper lands
• Welded “inner-layer” books to eliminate lateral movement of inner layers during the press cycle and to maintain optimum registration of inner layers
• Digital printing of inner layer pairs with integrated side to side line up to printed tooling targets ensuring optimum registration
• Automatic optical inspection
• 100% electrical test
• Test coupons and micro-sections
• Non-destructive plating copper thickness measurement