INDUSTRY FOCUS
MNR has been a leader in communications interfaces since the inception of the mobile phone. Together with the largest OEM manufacturers, we have created innovative designs that have kept our clients at the leading edge.
Motorola MicroTAC (the original “flip phone”)
The MNR team, in a prior life, supported the creation and development of the switch assembly stack for the Motorola MicroTAC, the first cellular flip phone, circa 1987. This design integrated a transparent keypad, transparent high-temp polydome, and a unique development – a transparent etched flex circuit. The assembly connected the phone’s main PCB to the keypad and the microphone in the flip cover.
Custom IP67 Digital Mobile Radio
This was the first IP67 Digital Mobile Radio and was designed to eliminate RTV sealants during assembly. The radio actually sealed with the assembly of the components. MNR coordinated this design from concept to completion and, specifically, designed the main keypad board and keypad, the PTT assembly, and the M5 microphone/speaker interconnect. Additionally, the user interface MNR designed passed IP67 immersion testing on the first try.
Classic ten pounds of technology in a two-pound package.
Motorola V70 Rotary Phone
MNR created the Technology Breakthrough “PTF” Plastic Thin Film technology, significantly reducing the interior height consumed by the keypad.
The PTF design reduces the in-housing keypad cross-section from traditional 1.0mm to ~ 0.3mm. This technology was a leap forward in reduced assembly thickness for mobile phones.
Using a variant of the PTF technology (P+PTF), MNR created this plastic keytop assembly with thin film construction. The low-profile construction technique packs more user experience in a minimum cross-section, with a bridgeless keypad design that includes Nav with Select Key.
Motorola Razor
MNR was instrumental in the development of the Razor (code name Blue Jay). We were a key early development partner in driving cell phone design technology to a <5mm total package thickness and were able to work with Motorola Advanced Development to create this thin cross-section construction and attain the thin profile used in the Razor.
