Anatomy of a High-Reliability Chip Resistor

Mini-Systems Resistor Applications - MSI

To illustrate Mini-Systems approach, the following design and fabrication considerations are used in the thick film manufacturing processes to maximize the components performance in:

Automated Electronic Assembly

Diamond saw die separation tightly controls the resistor's dimensional tolerances, thus improving pick and place assembly by reducing components misplacement and resets.

Surface Mount Adhesion

The unique, (5) sided construction of the wrap around termination maximizes the component to board solder adhesion in a way that minimizes component tombstoning when soldering.

Electrical Performance

The fine nozzle, micro abrasive sand blasting method of abrasively trimming resistors results in a component that has lower noise, better short and long term stability and improved power handling characteristics than a LASER trimmed component.

Bondability

All resistors are fabricated with the resistor film sandwiched between a bottom conductor and a top conductor termination. This construction exposes the maximum bond pad area for multiple wire bonds, automated wire bonding and solder coverage. Also inherent to this design is better long term stability, and power handling.

Solderability

Hot solder dip tinning for optimum shelf life and best solder wetting.

Chip Attach

Precisely screened on backside conductors provides a uniform clear space and prevents shorting.

Reliability and Testing

Processed materials are continuously tested for mechanical and electrical performance parameters to Mil-PRF-55342. Our current DESC failure rating is "S", which represents more than (91) million hours of life testing without a failure.

Stray Capacitance

Minimized and consistent by controlled dimensions imparted by (5) precise screenings.

ISO 9001 Certified. MSI has been a leading manufacturer of Precision Hi-Reliability Chip Resistors for more than 40 Years. Quick response to critical requirements and quick response to questions by knowledgeable sales and engineering staff are keys to providing the unsurpassed service our customers have learned to expect. MSI's products are designed for superior solder fillets for optimum performance in the area of stability, solderability, adhesion, power dissipation and life. Q.P.L. approved to all MIL-PRF-55342 style parts including the /1 part. "S" Failure Rate Qualified. There is no compromise in our effort to manufacture only the best products. Industry leading manufacturing practices have forged the way for MSI's technological superiority. We produce products that are in use in virtually all industries that require precision.

MSI Resistors - Thick Film & Thin Film, Attenuators, MOS Chip Capacitors and Networks
MSI Resistor Applications