ROHM has developed the industry's smallest level of small and light two-color patch LED "SML-D22MUW" to help industrial equipment and consumer
ROHM, the world's leading semiconductor manufacturer, has developed the industry's smallest 1608-size (1.6x0.8mm) two-color SMD LED "SML-D22MUW", which helps multi-color digital parts of display panels for industrial equipment and consumer electronics.
The product developed this time is the same size as the monochrome SMD LED package, only 1.6x0.8mm. The package has built-in red and green SMD LEDs to save space and achieve multi-color display. Compared with the conventional two-color type product (1.5x1.3mm), it not only reduces the volume by 35%, but also contributes to the thinning of the display panel.
In addition, in consideration of the use conditions at the time of reflow soldering of the customer, measures for preventing intrusion of solder are applied to the package to prevent the solder from intruding into the interior of the resin. This eliminates problems caused by solder intrusion and ensures high reliability.
This product has been sold in June 2017 (sample price 50 yen / piece: excluding tax), can be purchased online through AMYYA360, RighTIC. In addition, it is expected to start mass production at a scale of 3 million units per month from August 2017. The production base of the previous process is the headquarters of ROHM Co., Ltd. (Kyoto City), and the production base of the later process is ROHM Semiconductor (China) Co., Ltd. (China) and ROHM-Wako Electronics (Malaysia) Sdn. Bhd. (Malaysia).
In the future, ROHM will continue to promote the development of small and light-duty LEDs and continuously strengthen the product lineup with excellent usability.
<background>In recent years, digital displays of industrial equipment and consumer electronics have seen more and more use of patch LEDs. In the past, such display parts mostly used monochrome display, and the demand for an abnormal state to be more easily recognized by color change is increasing.
However, it is necessary to use two LEDs to change the display color. Compared with the monochrome type, the two-color type not only has a large size, but also needs to prepare two packages for monochrome and two colors, and the development cost is doubled.
1. Industry's smallest level of two-color SMD LEDs help miniaturize and thinner devices
SML-D22MUW not only realizes the miniaturization of components, but also realizes the 1.6x0.8mm package of the same size as the monochrome SMD LED with the PICOLED *1) mounting technology and wire bonding *2) technology accumulated for many years. Red and green patch LEDs in two colors.
In addition, the 1.2x0.8mm light-emitting part is equipped with a two-color light source, so the color mixing performance is excellent. The LEDs developed this time can display not only red and green colors, but also intermediate colors.
2. Prevents high reliability by soldering intrusion prevention measures
A stopper called "solder resist" is provided before the gold plating treatment to block the gold solder which is excellent in wettability.
It prevents solder from intruding into the resin, thus eliminating problems caused by short circuits and helping to improve reliability.
3. With the back electrode, the display is clearer
The package uses a back electrode that can be mounted at very narrow intervals. This enables a very high definition display in a dot matrix or the like.
<Product lineup>
1) PICOLED
Ideal for ROHM ultra-small thin LEDs for small portable devices such as wearable terminals and mobile devices.
*2) Wire bonding
The chip is directly mounted on a PCB board or the like, and is routed through leads such as gold, aluminum, and copper.
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