The industry's smallest NEC flash microcontroller using wafer level CSP

The day before the launch of NEC electronic 8 with a built-in flash EEPROM microcontroller, using wafer level CSP, the packaging area reached the industry's smallest 4.6mm2 (length of 2mm * 2.3mm width) (release). July 4, 2005 began to supply samples, in the same year in November put into mass production. In June 29, 2005 in Tokyo BigSight International Convention and Exhibition Center opened the eighth embedded system development technology exhibition (ESEC) on the show. NEC electronics said, using wafer level CSP in the micro controller is equipped with flash, "as far as we know, is the industry's first". 4.6mm2 packaging area equivalent to the company in May 2005 put into operation when the size of the industry for the smallest (NEC), 4mm square flash built-in 8 bit microcontroller 1/4. A total of 3 new products, equipped with flash capacity of 1KB (equivalent to 8Kbit), 2KB (equivalent to 16Kbit) and 4KB (equivalent to 32Kbit). The package size was 2mm in width 2.3mm * * thickness 0.4mm, pin number 16. The design process uses a 0.35 m process, rather than the company's first product in the introduction of 4mm square m 0.15.

The packaging area of the micro controller on board is 4.6mm2. Compared with the standard 8 bit microcontroller with no built-in flash EEPROM, the "1/15" (NEC). Packaging area is so big difference, because this product in addition to flash memory EEPROM, but also built in the usual way of using 3 components. These 3 elements are the clock generator, the monitoring timer, and the initialization signal to the microcontroller reset IC. These components, such as the use of external mode, plus flash EEPROM, packaging area of about 40mm2 (NEC). This figure coupled with what the company called the 8 microcontroller standard packaging area, that is, 32mm2, a total of 72mm2. This calculation, the 1/15 product package area for standard products.

Sample price, 1KB products for 250 yen, 2KB products for the yen, 4KB products of 300 yen in. 3 products together, and strive to reach the end of the year 2006 monthly production of 1 million"