New RASMID™ lineup of micro devices developed using innovative, breakthrough technologies Ultra-compact components that offer breakthrough levels of miniaturization utilizing completely new techniques
*ROHM Sept. 2013 survey
RASMID™ is a trademark of ROHM Co., Ltd.
What is RASMID™ ?
Resistors: Relative size vs. a 0.5mm lead for a mechanical pencilIn recent years, following the increasing sophistication and miniaturization of electronic devices comes a need for greater compactness at the component level. ROHM has been a pioneer in miniaturization technology, and is continually cultivating new methods to achieve the smallest devices in the industry. In 2011 ROHM developed chip resistors measuring just 0.3x0.15mm, smaller than the 0402 (0.4x0.2mm) size, which at the time was considered the limit of miniaturization. And in 2012 launched the industry's smallest* Zener diodes (0.4x0.2mm).
Currently, we are shipping samples of 03015-size chip resistors and 0402-size Schottky barrier diodes.
ROHM utilizes breakthrough processes and technologies to develop our new lineup of RASMID™ lineup of products featuring unprecedented miniaturization and superior dimensional accuracy (±10um).
Going forward, we will continue to pursue product miniaturization and cultivate technologies (i.e. mounting technology) to achieve practical realization while expanding our current lineup of RASMID™ products.
Unmatched Dimensional Accuracy
Novel processes are utilized to achieve a dimensional accuracy of ±10um,
resulting in the smallest form factors in the industry
- 44% smaller mounting area vs. conventional 0402-size resistors
- Samples shipped from January 2012, with mass production started in April 2014
- Mounting area reduced by 56% compared with conventional 0603-size products
- Samples shipped from October 2012, with mass production started in February 2014
- Mounting area reduced by 56% comparied with conventional 0603-size products
- Samples shipped from October 2013, with mass production started in February 2014
Percentages for mounting area were rounded off to the nearest integer
03015-Size chip Resistors
RASMID™ technology involves not only product miniaturization, but methods and techniques (i.e. in the mounting process) that can enable practical realization and commercialization as well. The result is a superior dimensional accuracy (less than ±10um), making it possible to develop breakthrough 03015-size products. In addition, after repeated discussions with mounting equipment manufacturers a zero defect rate was able to be achieved - even during mounting evaluation using a large sample size.
Mass production of the world's smallest* chip resistors already underway at ROHM's Apollo (Fukuoka) facility.
We will contribute to further end-product miniaturization by promoting the development of even smaller 0201-size (0.2x0.1mm) products.
Sample shipments scheduled to begin in 2015.
chip resistors developed using original process technologies
|Size||Rated Power||Rated Voltage||Max. Element Voltage||Resistance Tolerance||Resistance Range||Temperature Coefficient of Resistance||Operating Temperature Range|
|03015|| 1/50W |
|Calculated based on √(Rated Power x Nominal Value) or the Max. Element Voltage, whichever is smaller||10V|| F(±1%), |
| 10Ω to 1MΩ |
|±200ppm/℃||-55 to +125℃|
2. Chip dimensional precision improved from ±20μm to ±10μm
3. Successful history of resistor miniaturization
ROHM utilizes breakthrough proprietary manufacturing technologies to produce the RASMID™ series of Zener and Schottky barrier diodes in the industry-leading 0402 size (0.4x0.2mm) ideal for high density applications such as smartphones and other portable devices.
Manufacturing will be conducted at ROHM's Apollo (Fukuoka) facility. Samples are available now for shipment (20 yen/unit), with mass produced products offered from April 2014.
1. The world's smallest size (0402 - 0.4mmx0.2mm) achieved using original process technology
These new diodes reduce volume by 82% over conventional 0603-size products, contributing to greater miniaturization and higher performance in applications requiring a thin, compact form factor, such as smartphones and digital cameras.
2. Equivalent key characteristics (i.e. VF) of 0603-size products in a compact package
In general, with diodes there is a reciprocity between chip size and electrical characteristics. In order to break this relationship, an original chip device structure, along with high precision machining technology, was utilized to develop an ultra-thin, ultra-compact form factor that maintains the key characteristics of 0603-size products, such as VF.
|Size|| Voltage |
|Zener Voltage||Reverse Current||ESD|
|0402||5.1||4.840||5.370||5.0||2.0||1.5|| IEC61000-4-2 |
|Size|| VF |
| IR |
| VR |
(Rated Reverse Voltage)
|0402|| 0.37V |
| 7μA |
3. Chip dimensional precision improved from ±20μm to ±10μm
4. Extensive history of diode miniaturization