4 Layer Production Plus

The ProductionPlus Service is designed for 2-layer and 4-layer PCBs that include the silkscreen and solder mask layers. These additional layers give the boards a very professional appearance. This is also our best value when ordering large quantities of boards. Board outline can be any shape.

Multi-layer boards have many advantages over double-sided boards. They can be designed more compactly, they greatly improve noise immunity and are much easier to lay out.

Description

ProductionPlus 4-Layer Service boards have top and bottom copper layers with all holes plated through. Sandwiched inside are Signal, Ground or Power planes. Through-hole pads can be connected to, or isolated from, the planes. These boards also have top and bottom solder mask layers, giving them a dark green color. On the top surface or bottom surface is a white silkscreen layer showing the component outlines. Select a 2 day, 3 day or one-week manufacturing time.

  • New – Top and Bottom Silkscreen and Solder Mask
  • New – Expanded Holes Size Options
  • New – Inner Layer Traces on 4 Layer
  • Quantity Discount
  • Silver (RoHS) plating or Tin/lead
  • Perimeter routed to shape

Choose a tin/lead or lead-free RoHS compliant finish:

Photo4LayerProdPCB_TL_800 Photo4LayerProdPCB_LF_800

Quantity Discount
2-49 0
50-99 11%
100-249 15%
250-499 19%
500-999 22%
1000-1999 25%
2000-up 26%

Manufacturing Specifications

 

 Production Plus 4 Layer
Quantity1 and up
Layers4 Layer
Lead Time2 Day, 3 Day, 5 Day
Maximum Board SizeThe maximum board size we manufacture is 12 x 14 inches.
Minimum Board SizeMinimum dimension in height or width is 0.35 inches.Total board area must be greater than 0.4 square-inches. (i.e. smallest square board we can make is 0.64 x 0.64 inches)
Panelize Muliple BoardsWe do not recommend that users cut apart 4 layer boards because this can result in shorts between the inner layers.
Minimum Trace and SpaceEtching resolution is: 0.006″ minimum trace width, 0.006″ minimum space width.
Inner LayersThe two inner layers can have traces or solid copper planes. Through-hole pads can either be connected to or isolated from these copper planes. The planes are inset 0.025″ from each edge of the board.
Solder MaskTop and Bottom
Silk ScreenTop and Bottom
Surface FinishTin\Lead or Silver BtnLearnAboutLeadFreeOption
Solder Mask Pad TolerancePads on the solder mask layers are grown by 0.003″ on all sides. As a result, very fine pitch surface mount components may not include any solder mask between the pins.
MaterialOur 4 layer laminate is constructed as a .059" FR-4 package, which includes .0007" starting copper on layers 1 and 4 (industry standard 1/2 ounce copper base). We plate an additional .001" copper on the surface after drilling and imaging, resulting in a copper thickness on the surface of ~0.0017″. The two inner layers are each constructed with .0014" copper (industry standard 1 ounce).
Dielectric ConstantThe dielectric spacing between the top layer and the “Ground” inner layer is 0.012″ with a dielectric constant of 4.6 +/-0.2. The dielectric spacing between the bottom layer and the “Power” inner layer is 0.012″ with a dielectric constant of 4.6 +/-0.2. The dielectric spacing between the “Power” and “Ground” inner layers is 0.028″ with a dielectric constant of 4.6 +/-0.2.
Plated HolesBoards are manufactured with 4 copper layers and all holes plated-through.
HolesMinimum 0.008″ - Max 0.251″. Hole sizes in between as specified in software.
Hole ToleranceThese sizes are the finished hole diameters after plating. The 0.008″ and 0.014″ holes may be filled with solder and can only be used as via. The tolerance for the 0.020″ hole is +0.003 / -0.005. The tolerance for the other hole sizes are +/- 0.004″.
Hole Location ToleranceOur hole location tolerance is +/- 0.005”. As such, the tolerance between two holes would be +/- 0.010”.
Minimum Hole DistanceA minimum of 0.021″ space must remain between adjacent holes. For example, the center-to-center distance between two pads with 0.020″ holes must be 0.041″ or greater.
Internal Slots and CutoutsNone
Perimeter SlotsBoard perimeters are cut to shape using a 0.093″ router bit. Slots in the perimeter must be 0.100″ or wider. Narrower slots will not be milled correctly.
Perimeter RoutingThe edges of the board are cut with an accuracy of +/- 0.015″. A minimum of 0.020″ blank space is recommended between the perimeter and all features on the board. Traces placed closer than 0.015″ to the board’s edge may be routed off.
TemperatureThe maximum operating temperature is 125 degrees C.