Claims
- 1. An electron emission device comprising an electron emission electrode with a pointed end, a counter electrode opposite to the pointed end and an attracting electrode, with said electron emission electrode and said counter electrode being arranged side by side on an insulating surface of a substrate, said attracting electrode being arranged on the insulating surface of the substrate so as to face the substrate, and a recess being formed in a region of the insulating surface of the substrate corresponding to a portion between the pointed end of said electron emission electrode and said counter electrode, wherein the recess in said insulating surface extends underneath the electron emission electrode to form a gap in the insulating surface between a portion of said electron emission electrode and the substrate beyond a passing area of electrons emitted from the pointed end.
- 2. An electron emission device according to claim 1, wherein
- said attracting electrode has an aperture through which an electron emitted from said electron emission electrode passes.
- 3. An electron emission device according to claim 1, wherein
- said electron emission electrode is made of a material selected from W, Zr, Ti, TiC, ZrC, HfC, LaB.sub.6, SmB.sub.6, GdB.sub.6, WSi.sub.2, TiSi.sub.2, ZrSi.sub.2 and GdSi.sub.2.
Priority Claims (2)
Number |
Date |
Country |
Kind |
62-108846 |
May 1987 |
JPX |
|
62-108847 |
May 1987 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/038,067 filed Mar. 29, 1993, now abandoned, which is a continuation of application Ser. No. 07/751,633 filed Aug. 26, 1991, abandoned, which is a continuation of application Ser. No. 07/386,242 filed Jul. 28, 1989, abandoned, which is continuation of application Ser. No. 07/189,216 filed May 2, 1988, abandoned.
US Referenced Citations (4)
Continuations (4)
|
Number |
Date |
Country |
Parent |
38067 |
Mar 1993 |
|
Parent |
751633 |
Aug 1991 |
|
Parent |
386242 |
Jul 1989 |
|
Parent |
189216 |
May 1988 |
|