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Quality is defined at our facility as servicing the customer's needs with products that meet or exceed requirements in a timely and cost effective manner. We have achieved ISO-9002 certification through coordinated team efforts between all departments. The philosophy of teamwork is deeply ingrained into our culture and facilitates attainment of company goals.

In order to manufacture and deliver a quality product, the entire build process must be controlled. We strive to determine and monitor the capability of each process, in accordance with standard SPC practices. Areas for control include raw powder materials, powder preparation, key characteristics of finished powder, pressing, sintering and finishing (as required). Parts are inspected on a sample basis per established industry standards, such as MIL-STD-105E or C=0.

Depending on the part configurations, various mechanical and electrical characteristics may be verified. State of the art electrical analyzers, bridges and precision mechanical hand tools are utilized by trained personnel to assure accurate data. Hewlett-Packard 4291A RF impedance/material analyzers provide inductance, impedance and capacitance data as required. Arithmetic functions built into the equipment allow for direct reading of values, after initial setup. Capacitance testing of coilforms is accomplished with GenRad 1687 and 1689 precision RLC bridges. Utilizing in-house software, the bridge output is monitored and statistically compiled in order to assess the material under test. Inductance testing and sorting utilizes HP 4284A precision LCR meters. This equipment, utilizing in-house programming and fixturing, allows for accurate sort/test of inductance values. HP 4342A Q-meters provide Q values for coilforms. Values are obtained by fine tuning the frequency required to "peak" the Q meter. Quad-Tech 1870 AC/DC dielectric analyzers help perform traditional hi-pot testing and DC current resistance testing. This determination of voltage required to breakdown the insulation resistance allows us to verify the integrity of applied Parylene or epoxy coatings. Additionally, Quad-Tech 1633A incremental inductance bridges assist testing of our DC bias material. In this application, the bridge measures Rs and Ls. Bridge frequency and alternating voltage are set and DC bias varied for the test conditions. The bridge will read the inductance, with or without a superimposed direct current. Proper calibration status is maintained on mechanical and electrical equipment, traceable to NIST standards.

We continuously examine our facility for potential improvements. Vendor communications and customer support are an integral part of our business. It is through actions like these in an atmosphere of Total Quality Management that we plan to service our customers in the increasingly competitive global marketplace.

MMG Test Equipment
In order to provide our customers with consistent and high quality products MMG has instituted a regular calibration program which conforms to ISO 9002 standards.

Powder Lab
Computac Moisture Analyzer
10 mg resolution digital scale
battery of Tyler screens (35 to 325 mesh)
Stereo Microscope

Press Tool Crib
Hardness Tester
1 to 1000 micro-inch Surfindicator
Microscope
Bore Gauges
0.1 mg resolution digital scale
0.0001" resolution micrometers
0.0001" Digimatic Depth Gauges
0.001" Dial Calipers
0.001" Increment Pin Gauges

Production Departments
0.0001" resolution micrometers
0.0001" Digimatic Depth Gauges
0.0002" resolution profile projector
0.001" Dial Calipers
0.001" Increment Pin Gauges
Stereo Microscopes

Final Inspection
0.0001" resolution micrometers
0.0001" Digimatic Depth Gauges
7x to 30x Stereo Zoom Microscope
0.0001" resolution profile projector
HP 4275A LCR Meter
HP 4284A LCR Meter
GR1689 LCR Meter
GR1687 1MHz LCR Meter
GR1633 Incremental Inductance Test Set
Chatillon DFI-50 Force Gauge
-55 to +170 deg. C Temperature Chamber
0.0005" Digital Calipers
0.001" Increment Pin Gauges
0.0002" resolution toolmaker's microscope
Transformer turns ratiometer
HP 4191A Impedance Analyzer
HP 4332A LCR Meter
HP 4342A Q-Meter
HP 4815A Vector Impedance Meter
Quadtech 1870 Dielectric Analyzer
Wayne Kerr 4210S LCR Meter
Fluke 52 Digital Thermometer

Engineering Lab
HP 4291A Impedance Analyzer
HP 4753A Network Analyzer
HP 54501A Digital Oscilloscope
HP 8111A Signal Generator
Clarke Hess 258 VAW Meter
ENI 1500 Wide Band Amplifier
HP 4332A LCR Meter
-55 to +170 deg. C Temperature Chamber
Fluke 52 Digital Thermometer

MMG's Standard Quality Controls
All batches of material receive a full battery of Intrinsic and Extrinsic evaluations before being released for Production.
X-ray Fluorescence Chemical Composition Analysis
Particle Size Distribution Characterization
Angle of Repose
Bulk Density
Mass Density
Specific Gravity
Permeability
Sintering Shrink Characterization
Loss Factor
Temperature Response

First Article Inspection is performed when a job is released to the Press Department. Samples from the first pressing are run through subsequent processes to evaluate adequacy of the pressing and sintering effects. New batches and jobs go through a Pilot evaluation.
In-Process inspections are performed in the: Press, Tumbling, Grinding, Parylene and Sorting Departments. Standard Final Inspection methods for closed magnetic structures are :
one turn computer aided inductance test to Level I - 0.65% AQL
10 turn wound correlation for inductance, Q and/or impedance
of stratified samples from the one turn inductance test
Dimensional inspection to Level S3 - 1% AQL
Visual inspection to Level I - 0.65% AQL

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MMG-North America
126 Pennsylvania Ave   •   Paterson, NJ 07503   •   United States
Tel: (973) 345-8900   •   Fax: (973) 345-1172
Mail us: sales@mmgna.com