Document Number: 28700 For technical questions, contact: thinfilmchip@vishay.com www.vishay.com
Revision: 18-Dec-09 211
MCS 0402, MCT 0603, MCU 0805, MCA 1206 - Precision
Precision Thin Film Chip Resistors Vishay Beyschlag
DESCRIPTION
Production is strictly controlled and follows an extensive
set of instructions established for reproducibility. A
homogeneous film of metal alloy is deposited on a high grade
Al203 ceramic substrate and conditioned to achieve the
desired temperature coefficient. Specially designed inner
contacts are deposited on both sides. A special laser is used
to achieve the target value by smoothly fine trimming the
resistive layer without damaging the ceramics. A further
conditioning is applied in order to stabilize the trimming
result. The resistor elements are covered by a blue
protective coating designed for electrical, mechanical and
climatic protection. The terminations receive a final pure tin
on nickel plating.
The result of the determined production is verified by an
extensive testing procedure and optical inspection
performed on 100 % of the individual chip resistors. Only
accepted products are laid directly into the paper tape in
accordance with IEC 60286-3 (3).
ASSEMBLY
The resistors are suitable for processing on automatic SMD
assembly systems and for automatic soldering using wave,
reflow or vapour phase. The encapsulation is resistant to all
cleaning solvents commonly used in the electronics industry,
including alcohols, esters and aqueous solutions. The
suitability of conformal coatings, if applied, shall be qualified
by appropriate means to ensure the long-term stability of the
whole system.
The resistors are RoHS compliant, the pure tin plating
provides compatibility with lead (Pb)-free and
lead-containing soldering processes. Solderability is
specified for 2 years after production or requalification. The
permitted storage time is 20 years. The immunity of the
plating against tin whisker growth has been proven under
extensive testing.
All products comply with the GADSL (1) and the
CEFIC-EECA-EICTA (2) list of legal restrictions on
hazardous substances. This includes full compliance with
the following directives:
•2000/53/EC End of Vehicle life Directive (ELV) an Annex II
(ELV II)
•2002/95/EC Restriction of the use of Hazardous
Substances Directive (RoHS)
•2002/96/EC Waste Electrical and Electronic Equipment
Directive (WEEE)
APPOVALS
The resistors are approved within the IECQ-CECC Quality
Assessment System for Electronic Components to the detail
specification EN 140401-801 which refers to EN 60115-1,
EN 140400 and the variety of environmental test procedures
of the IEC 60068 (3) series.
Conformity is attested by the use of the CECC Logo ( ) as
the Mark of Conformity on the package label.
Vishay BEYSCHLAG has achieved “Approval of
Manufacturer” in accordance with IEC QC 001002-3,
clause 2. The release certificate for “Technology Approval
Schedule” in accordance with CECC 240001 based on
IEC QC 001002-3, clause 6 is granted for the
Vishay BEYSCHLAG manufacturing process.
RELATED PRODUCTS
On request, resistors are available with established
reliability in accordance with EN 140401-801 version E.
Please refer to the special datasheet document no. 28744 for
information on failure rate level, available resistance ranges
and order codes.
For more information about products with higher rated power
and higher operation temperature please refer to the
Professional Thin Film Chip Resistor datasheet document
no. 28705.
Precision chip resistor arrays may be used in voltage
divider applications or precision amplifiers where close
matching between multiple resistors is necessary. Please
refer to the ACAS 0612 - Precision datasheet document no.
28751.
Notes
(1) Global Automotive Declarable Substance List, see www.gadsl.org
(2) CEFIC (European Chemical Industry Council), EECA (European Electronic Component Manufacturers Association), EICTA (European trade
organisation representing the information and communications technology and consumer electronics), see www.eicta.org/index.php?id=995
→ issues → environment policy → chemicals → chemicals for electronics
(3) The quoted IEC standards are also released as EN standards with the same number and identical contents