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RF6100-4
Rev A0 031217
PCB Design Requirements
PCB Surface Finish
The PCB surface finish used for RFMD's qualification process is electroless nickel, immersion gold. Typical thickness is
3
µinch to 8µinch gold over 180µinch nickel.
PCB Land Pattern Recommendation
PCB land patterns are based on IPC-SM-782 standards when possible. The pad pattern shown has been developed and
tested for optimized assembly at RFMD; however, it may require some modifications to address company specific
assembly processes. The PCB land pattern has been developed to accommodate lead and package tolerances.
PCB Metal Land and Solder Mask Pattern
Thermal Pad and Via Design
The PCB land pattern has been designed with a thermal pad that matches the exposed die paddle size on the bottom of
the device.
Thermal vias are required in the PCB layout to effectively conduct heat away from the package. The via pattern has been
designed to address thermal, power dissipation and electrical requirements of the device as well as accommodating
routing strategies.
The via pattern used for the RFMD qualification is based on thru-hole vias with 0.203mm to 0.330mm finished hole size
on a 0.5mm to 1.2mm grid pattern with 0.025mm plating on via walls. If micro vias are used in a design, it is suggested
that the quantity of vias be increased by a 4:1 ratio to achieve similar results.
Dimensions in mm.
Metal Land Pattern
Pin 1
A
A
A
A
A
A
3.40 Typ.
2.55 Typ.
1.90 Typ.
1.50 Typ.
0.85 Typ.
0.00
0.20 Typ.
0.20 Typ.
0.65 Typ.
1.05 Typ.
1.70 Typ.
2.35 Typ.
2.75 Typ.
3.60 Typ.
A = 0.40 (mm) Sq. Typ.
Solder Mask Pattern
A
A
A
A
A
B
A
A
A
A
A
Pin 1
3.40 Typ.
2.55 Typ.
1.70 Typ.
0.85 Typ.
0.00
A = 0.55 (mm) Sq. Typ.
B = 2.65 x 3.95 (mm)
Figure 1. PCB Metal Land Pattern and Solder Mask Pattern (Top View)
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