2024年6月13日发(作者:)
TECHNICAL DATA SHEET
PSR-4000 MP
(UL Name: PSR-4000MP / CA-40MP)
LIQUID PHOTOIMAGEABLE SOLDER MASK
Screen or Spray Application
Dark Green, Matte Finish
RoHS Compliant
Excellent Solder Ball Resistance
Compatible with Lead-Free Processing
Hard Surface Finish and Low Odor
Wide Processing Window
Fine Dam Resolution
Withstands ENIG & Immersion Tin
1 | PageRevised March 31, 2016
TECHNICAL DATA SHEET
P
ROCESSING
P
ARAMETERS FOR
PSR-4000
MP
PSR-4000 MP is a two-component, matte dark Green, alkaline developable LPI solder mask products
for flood screen and spray application methods. This product has a low odor, a wide process window
and is capable of withstanding alternate metal finishes such as ENIG and immersion Tin. It has a
matte Dark Green finish and provides excellent solder ball resistance in no clean flux assembly
applications. PSR-4000 MP meets or exceeds the requirements of IPC SM-840E Class H and Class
T, Bellcore GR-78-CORE Issue 1, and has a UL flammability rating of 94V-0. All Taiyo America
products comply with the Directive 2002/95/EC of the European Parliament and of the Council of 27
January 2003 on the Restriction of the use of certain Hazardous Substances (RoHS) in electrical and
electronic equipment.
PSR-4000
MP
C
OMPONENTS
PSR-4000MP /
Mixing Ratio 100 parts
Color Green
Mixed Properties
Solids 80%
Viscosity 140-180ps
Specific Gravity 1.58
CA-40MP
25 parts
White
M
IXING
PSR-4000 MP is supplied in pre-measured containers with a mix ratio by weight
of 100 parts PSR-4000 MP and 25 parts CA-40MP. PSR-4000 MP can be
mixed by hand with a mixing spatula for 10 – 15 minutes. Mixing can be done
with a mechanical mixer at low speeds to minimize shear thinning for 10 – 15
minutes. Also, mixing can be done with a paint shaker for 10 – 15 minutes.
Pot life after mixing is 72 hours when stored in a dark place at ≤ 25°C (77°F).
P
RE
-C
LEANING
Prior to solder mask application, the printed circuit board surface needs to be
cleaned. Various cleaning methods include Pumice, Aluminum Oxide,
Mechanical Brush, and Chemical Clean. All of these methods will provide a
clean surface for the application of PSR-4000 MP. Hold time after cleaning the
printed circuit board should be held to a minimum to reduce the oxidation of the
copper surfaces.
2 | PageRevised March 31, 2016
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