Transcript Resistor Trimming

Design Guidelines
Conductors
Metallized Holes
Via Fills
Resistors
Substrates
Layout
Material Properties
Data Formats
PHOTO
NEEDED
Conductors
Minimum line width
Minimum space width
Line & space tolerance
small as 2 microns for specials
0.0005" Standard
as small as 2 microns for specials
0.0001" (Ion-milled)
Common Conductors
Metallized Holes
Minimum
Minimum
Minimum
Minimum
Minimum
aspect ratio
separation from edge
tolerance
location tolerance
pad size around via
1:1, 1:2 for specials
Thickness of substrate
+/- 0.001"
+/-0.0005"
0.015" + via diameter
Via Filling
Resistors
Minimum conductor overlap
Minimum Spacing between resistors
Minimum Pad size
0.002"
0.005"
0.005"
Resistor Types
Text Needed Here
Resistor Trimming
We use low power yag trimmers that are capable of active and passive trim. Resistor trim ranges of 1 Milliohm
to 1 Gigohm are possible with an astonishing accuracy of ± .05%. We have years of experience in trimming
resistors. Complete read and write systems that monitor our accuracy, percent yield, and final trim values.
Electronic data transfer of resistor values can be provided for your convenience. For circuit trimming, circuit
performance adjustments are accomplished via resistor values per individual circuit.
Thin Film Resistor TrimmingTight tolerances is a critical requirement in thin film
contract trimming services. P/M Industries is capable of trimming to tight
tolerances because of our custom trim system capabilities. Measurement subsystems, the most accurate of any available, are maintained traceable to NBS
standards.Kerf widths less than 0.001 inches (25 microns) are required because
of thin film, fine line technology. Our trim system optics are specifically designed
for this requirement. Position resolution of 0.0001 inches (2.5 microns) is
maintained by periodic preventative maintenance. These two attributes of our
systems assure that your thin film, fine line resistors are trimmable.Fast turnaround is the result of step and repeat and single part handlers in place and ready
to go to work. Trim systems equipped with an array of different handlers
minimizes set up time between jobs and prevents production bottlenecks, should
a system undergo maintenance.Trim strategies, such as serpentine cutting of
block resistors, multiple leg trims, ladder and scrub cuts, provide for flexibility in
your design and maximum stability after trimming. P/M has over 20 years
experience working with thin film circuits. P/M has the technical know how to
provide expert handling of your products.Whether your requirements are for a few
prototypes or scheduled production runs, P/M has the staff and equipment ready
to go to work for you. If you have captive capability, it makes good sense to
qualify us as your outside source. Capabilities:
Substrate Size:
single circuits up to 3" X 3"
step and repeat arrays to 5" X 7"
Resistor Trimming
Capabilities:
Single circuit size as large as 3"x3"
Step and repeat arrays as large as 5"x7"
Measurement accuracy of 5% below 10 ohms, 1% between 10 and 50 ohms, 0.5% between 50
and 10,000 ohms, 1% between 10,000 and 75,000 ohms, 5% above 75,000 ohms.
Kerfs as wide as 0.003" and as narrow as 0.0005"
On-line equipment that can generate most functions and measure frequency, voltage, current and
capacitance during trimming
Laser cut features as small as 100 micro inches
Laser positioning accuracy as fine as ± 100 microinches
Cut placement capability of ± 7 micro inches
Plunge, “L”, venire , opposing “L”s, serpentine, scrub, “J” and “U” cuts
Standard Laser Trim Cuts
Substrates
Material Properties
Layout