Knowles Precision Devices acquires DITF

Knowles Precision Devices is pleased to announce our acquisition of DITF Interconnect Technology.

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Certified since March 2010
and upgraded to ISO 9001:2015 in 2018

ISO Cert



Supported Bridges

An integral part of any circuit design are couplers (including Lange couplers) and spiral inductors.  These structures can be a challenge to the assembly process and a source of common damage during manufacturing and testing.  Wire bonding these features also introduces inconsistency in the design which can result in more tuning and variability, especially over broad frequency ranges.  Long an industry standard, DITF offers supported bridges—a consistent, reliable way to incorporate these structures.  DITF can also test these features to ensure performance prior to integrating high cost active devices.

Fine Line Conductor Standard Layout Guidelines

Feature Values and Tolerances Comments

.0004" minimum ± .0001"

Minimum space width available in TiW films only

.0005" minimum ± .0001"

Minimum line width available in TiW films only

.001" minimum

.0001" Bridge/Conductor Pullback

.001" square minimum


.003" minimum


.0015" x .003"

.0025" overlap, insulator to conductor

width + .006", span + .008"

may be deleted at factories discretion on small bridges

200 microinches minimum

250 ±50 microinches typical

250 microinches minimum

300 ± 50 microinches typical

6:1 maximum