摘要:
The present invention provides a method utilizing the fabrication process of poly-Si spacers to build a flash memory with 2bit/cell. In the present invention, recessed poly-Si spacers are used to fabricate discontinuous floating gates below a control gate to build a flash memory with 2bit/cell. The present invention is characterized in that the fabrication process of poly-Si spacers is exploited to complete the fabrication process of floating gates in automatic alignment way without any extra mask process. Moreover, each memory cell in this flash memory can store two bits, hence increasing the memory capacity.