公开(公告)号：CA2295290A1

公开(公告)日：2000-07-25

申请号：CA2295290

申请日：2000-01-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： JIN SUNGHO ,  KOCHANSKI GREGORY PETER ,  ZHU WEI

IPC: B01J20/20 ,  C01B3/00 ,  C01B31/02 ,  H01J1/304 ,  H01J9/02 ,  H01J23/05 ,  H01J25/38 ,  H01J29/04 ,  H01J31/12 ,  H01J9/12

Abstract: The emission properties of aligned nanotube arrays are improved by truncating the ends of the nanotubes. Truncation provides nanotubes having a height within, for example, 30% of the average truncated nanotube height, as well as ends substantially free of end caps. The cap-free ends provide desirable field concentration, and the height uniformity increases the number of participating nanotubes.

公开(公告)号：CA2294656A1

公开(公告)日：2000-07-25

申请号：CA2294656

申请日：2000-01-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KOCHANSKI GREGORY PETER ,  JIN SUNGHO ,  ZHU WEI

IPC: B81C1/00 ,  H01J1/304 ,  H01J9/02 ,  H01J23/04 ,  H01J23/06 ,  H01J25/38 ,  H01J29/04 ,  H01J31/12 ,  H01J1/00

Abstract: An improved process for fabricating nanotube field emitter structures is provided, in which the nanotubes protrude from a supporting base material to improve emission properties. The resulting emitter structure are useful in a variety of devices, including microwave vacuum tube devices and flat-panel, field-emission displays. To attain the protruding nanotube emitter structure, according to one embodiment of the invention, nanotubes and metal particles are mixed and consolidated into a compact, and the compact is then sectioned to expose a substantial number of nanotube ends. A layer of the metal is selectively etched from the sectioned surface, leaving the exposed nanotubes protruding from the surface. The extent of protrusion is at least twice the average diameter of the nanotubes, advantageously at least ten times the average diameter of the nanotubes.