LEE Flash G1, Good Cost Performance SONOS Flash

LEE Flash G1

LEE Flash G1 (G1) is based on simple SONOS architecture and capable to scale down to 40nm geometry and supports auto grade temperature and quality.
G1 is cost effective Flash solution up for medium memory capacity requirement up to several 100KBytes.
G1 also allows user to re-use IPs and Macros developed for standard CMOS platform because the adoption of G1 process module does not change characteristics of the logic transistors and SPICE model.

Major Features

  1. Supports high temperature and long retention life time for severe automotive requirement
  2. Low power in Program/Erase operation for power critical applications
  3. Requires few (2~3) additional masks
  4. No change to SPICE model of Standard CMOS process, for re-using existing design and IP
  5. Short Test and Bake time to reduce chip cost

High Temperature Operation

SONOS is the device which enables memory functionality trapping electrons in Silicon Nitride film, and the retention life is controlled by optimization of thickness and film properties of oxide and Silicon Nitride films.
G1 is able to support operation temperature up to 150C and 20years of data retention life at 150°C.

Large Programming Size enables Short Testing Time

LEE Flash G1 image

G1 uses FN tunneling technology to achieve extremely low power in program and erase.
It consumes 1/1,000,000 times current, compare toconventional technologies using hot carrier injection for program/erase operation.
This also helps reducing testing time, which dominates large portion of the chip cost.

Low Cost

Short Test Time: G1 achieves very short test time for two reasons.

  1. Extremely low power in program/erase allows tester to program/erase the whole memory mat at once, compare to conventional solution program/erase smaller sections for many many times to program/erase the whole memory mat.
  2. Sharp Vt distribution in programming will eliminate the requirement for multiple programming and verification, so that programming operation always completes at one time, not in multiple steps, to dramatically reduce programming time.

Short Baking Time

Floadia’s unique memory architecture simplifies Life Time Prediction of the memory cell, which allows chip company to screen devices with shorter baking time.

2-3 Mask adder

G1 requires only 2 to 3 additional masks on standard CMOS process, reducing expensive mask cost to implement NVM feature on your chip. Conventional solution will usually take around 10+ additional masks and uses special manufacturing process.

Re-use of existing IP asset

Unlike normal Flash IPs, our Flash IP does not affect SPICE model of the logic transistors, which means you can utilize existing IPs and assets that has been developed, and will eliminate additional IP investment specific for Flash ICs.

Sample Spec

LEE Flash G1
Item Specification
Process platform 180nm 90nm 55nm
supply voltage 1.8V / 2.7V~3.3V / 4.5~5.5V
Extra mask 3
Endurance 100K
Data retention 10 years@~150°C
Program / Erase method FN tunneling / FN tunneling
P / E time ~2ms,  6ms
P / E unit (Bytes) 64B/4KB
P / E current ≦2mA
Access time ~50ns
Read current 100uA/MHz

Track Record

  • In High Volume Production at 90nm
  • Production Ready at 55nm
  • In development at 130nm, 150nm and 180nm