Thin-Film RF/Microwave Capacitor Technology
Automotive Grade Accu-P® Series
Application Notes
GENERAL
COMPONENT PAD DESIGN
Accu-P® SMD capacitors are designed for soldering to printed circuit boards
or other substrates. The construction of the components is such that they
will withstand the time/temperature profiles used in both wave and reflow
soldering methods.
Component pads must be designed to achieve good joints and minimize
component movement during reflow soldering. Pad designs are given
below for both wave and reflow soldering.
The basis of these designs is:
a. Pad width equal to component width. It is permissible to decrease this
to as low as 85% of component width but it is not advisable to go below
this.
b. Pad overlap 0.5mm beneath large components. Pad overlap about
0.3mm beneath small components.
c. Pad extension of 0.5mm for reflow of large components and pad
extension about 0.3mm for reflow of small components. Pad extension
about 1.0mm for wave soldering.
CIRCUIT BOARD TYPE
The circuit board types which may be used with Accu-P® are as follows:
All flexible types of circuit boards
(eg. FR-4, G-10) and also alumina.
For other circuit board materials, please consult factory.
HANDLING
SMD capacitors should be handled with care to avoid damage or
contamination from perspiration and skin oils. The use of plastic tipped
tweezers or vacuum pick-ups is strongly recommended for individual
components. Bulk handling should ensure that abrasion and mechanical
shock are minimized. For automatic equipment, taped and reeled product
gives the ideal medium for direct presentation to the placement machine.
REFLOW SOLDERING PAD DIMENSIONS: millimeters (inches)
0402
0603
0805
Accu-P®
Accu-P®
Accu-P®
0.6
(0.024)
0.85
(0.033)
1.0
(0.039)
1.7
0.5
2.3
0.6
(0.068) (0.020)
(0.091) (0.024)
3.0
1.0
0.6
(0.024)
(0.118) (0.039)
0.85
(0.033)
0.55
(0.022)
0.8 (0.031)
1.0
(0.039)
1.25 (0.049)
The Important Information/Disclaimer is incorporated in the catalog where these specifications came from or available
online at www.kyocera-avx.com/disclaimer/ by reference and should be reviewed in full before placing any order.
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TDS-RFM-0041 | Rev 1
rf microwave products
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