Devices feature superior dimensional accuracy for wearables

ROHM overcame the design challenges of producing chip resistors smaller than the 0402 size by utilising market-proven proprietary technology, breaking completely from convention in order to advance component miniaturisation. As a result, dimensional accuracy (±10μm) has been achieved, which also reduces lateral electrode irregularities. Enhanced dicing methods enable minimal adhesion areas and increased mounting accuracy, while mounting errors and “tombstoning” are significantly reduced by adopting bottom electrodes. High-precision high-density mounting has become a reality through joint development of mounting technology with ROHM’s partners and finally, excellent shock properties and bonding reliability have been secured by reducing size and weight.

As a result, the company's 03015-size resistors are, they claim, the most compact electronic components available at the production level while featuring high accuracy and improved dimensional precision from ±20um to ±10um. The device size is reduced by 56% over conventional 0402-size products and the required mounting area is reduced by 44%. 

Designed specifically for mobile devices, the 'world’s smallest' class of 0402-sized Schottky barrier diodes enable high-density mounting. The size of the device has been reduced by 44% compared to the conventional 0603 size (0.6mm × 0.3mm), while mounting area is reduced by 56%. Dimensional precision has also been improved from ±20um to ±10um, enhancing stability in existing automated mounting equipment. By adopting proprietary chip device structures and ultra-precise processing techniques, key electrical characteristics such as forward voltage (VF) and high power (0.1W) are maintained while reducing size and thickness compared to conventional 0603-size products.

Gold electrodes have been utilised in both cases for superior solderability and reliability.