Area selective ald. First of all it dealt with ald as most of the presentations during the workshop. Tutorial on area selective atomic layer deposition stacey f. 1605 1620 area selective ru ald for sub 7 nm bottom up metal interconnects ivan zyulkov ku leuven imec 1620 1635 area selective deposition of metal films john g.
Among many competing techniques area selective atomic layer deposition as ald is a promising method that is well suited to the requirements without the use of complicated complementary metal oxide semiconductor cmos incompatible processes. In a sense area selective ald utilizes effects that historically have annoyed ald users namely that due to the chemical nature of ald nucleation can depend on the initial surface. Area selective ald by area activation.
Both area selective atomic layer deposition ald and area selective molecular layer deposition mld are demonstrated on cusio 2 patterns using octadecylphos phonic acid odpa self assembled monolayers as a resist layer. In this work the dmadms and dmatms si precursors are utilized as inhibitors for area selective ald as ald. The title of my presentation of last year was ald enabled nanopatterning.
X ray photoelectron spectroscopy and auger electron spectroscopy conrm that during a metal oxide ald process. The inhibitors selectively adsorb on a sio2 surface but not on hsi so that. Most notably the semiconductor industry has relentlessly pursued sub 10 nm transistor fabrication for next generation devices an endeavor that increasingly relies on selective deposition techniques to.
The main challenge is to understand and control thin film nucleation. 67 this review paper was published just before the recent surge of interest in area selective deposition caused by the imminent need for self aligned fabrication in semiconductor processing. Short chain aminosilanes namely bisnn dimethylaminodimethylsilane dmadms and nn dimethylaminotrimethylsilane dmatms have been used as si precursors for atomic layer deposition ald of sio2.
The difference is you trick the ald process so that it grows on material a but does not grow on material b. Ekerdt universtiy of texas at austin 1635 1655 selective deposition. Area selective deposition also uses ald but its different than traditional ald.
Area selective ald here in the configuration of direct write ald can be used to pattern electrical contacts on sensitive nanomaterials such as carbon nanotubes or graphene. Developments in nanoelectronics and nanoscale surface modification have continued to drive the need for more elegant and reliable bottom up area selective deposition asd strategies.