04 August 1995
Vol 269, Issue 5224

About The Cover

Fragment of an elastomeric stamp used to print selfassembled monolayers on curved surfaces. The colors are light-diffracted from patterns of micrometer-scale relief features on one surface of the stamp. Contact printing with a flexible stamp circumvents some of the limitations of narrow depth-of-field that restrict photolithography to flat surfaces. (The stamp is 15 millimeters wide and 0.4 millimeter thick.) See page 664. [Image: Felice Frankel]