6 of 8
RF6100-4
Rev A1 DS050929
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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 8
μinch 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 pro-
cesses. 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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