摘要:
In modernen Elektronenstrahlschreibern wird das zu strukturierende Objekt mit mehreren Sonden gleichzeitig bearbeitet. Verglichen mit lichtoptischen Lithographiesystemen ist der mit diesen Geräten erzielbare Durchsatz an strukturierten Wafern aber noch gering, da auf jede der Sonden nur ein Bruchteil des Quellenstroms entfällt. Es wird deshalb vorgeschlagen, den Strahlerzeuger (Q) des Lithographiegerätes mit mehreren vorzugsweise linienförmig angeordneten Elektronenquellen (Q1, Q2) auszustatten und diese mit Hilfe einer telezentrischen Elektronenoptik (L1, L2) verkleinert auf das zu strukturierende Objekt (W) abzubilden.
摘要:
A charged-particle beam pattern drawing apparatus for drawing, by use of a charged-particle beam, a desired circuit pattern on a workpiece (WF) having a surface coated with a sensitive material, is disclosed. The apparatus includes a data source CAD, PG, MU, ML) having stored therein a data related to the circuit pattern, a plurality of charged-particle beam producing sources (ES0-ES15) for emitting charged-particle beams toward the workpiece, in accordance with the data supplied thereto from the data source, and a plurality of deflecting electrodes (X1,X2,Y1, Y2) each being provided for corresponding one of the charged-particle beam producing sources, for deflecting the charged-particle beams from the charged-particle beam producing sources independently of each other and in accordance with the data supplied from the data source.
摘要:
A charged-particle beam apparatus comprises a beam splitting/alignment system whereby individual beams or groups of individual beams can be independently aligned so that they can be brought out of focus in a focal plane of the individual beams, so that a beam limiting diaphragm arranged at that area is irradiated more uniformly with a smaller beam loss.
摘要:
A charged particle beam lithography system has a high-throughput and inexpensive system configuration. The system configuration is constituted by a plurality of charged particle optical systems (17, 18, 19) each adapted to focus and deflect a beam of charged particles and irradiate the beam onto a specimen (10) so that the beam draws a desired pattern on the specimen, a plurality of deflection distortion correcting circuits (14, 15, 16) each associated with each of the charged particle optical systems for correcting a deflection distortion of each charged particle optical system, and a common pattern data control circuit (1, 3, 4) for supplying data of a pattern to be drawn to each of the plurality of deflection distortion correcting circuits.
摘要:
Aperturblende mit einer zeilenförmigen Mehrlochstruktur mit Austastelektroden zur Erzeugung einer Mehrzahl von individuell austastbaren Korpuskularstrhalsonden für ein Lithografiegerät mit einer Korpuskularstrahlquelle (1), einem Kondensorlinsensystem (2, 3), einer Austastblende (5), einer Abbildungsoptik (6, 7, OL) und einem zu strukturierenden Körper - (9), insbesondere Halbleiterkörper. Angestrebt wird eine einfache und technisch wenig aufwendige Aperturblende, die insbesondere für eine große Zahl von Ausnehmungen zur Sondenerzeugung ausgelegt sein kann. Dies wird dadurch erreicht, daß die Aperturblende (4) aus einem hochohmigen Substrat, insbesondere Silizium oder Siliziumoxid, besteht, auf dem die Austastelektroden in Form von Leiterbahnen (21, 23, AE, 27) aufgebracht sind, die mit Anschlüssen (24, 26) für die Zuführung von Austastspannungen versehen sind.
摘要:
In an electron beam exposure apparatus, both a high acceleration voltage electron beam source (10,21) and a low acceleration voltage electron beam source (11,20) are provided. In one embodiment (Figure 3), the high acceleration voltage electron beam (EB H ) from the source (10) is used for forming fine patterns, and the low acceleration voltage electron beam (EB L ) from the source (11) is used for forming coarse patterns. In another embodiment (Figure 4), the high acceleration voltage electron beam (EB s ) from the source (21) is used for position-detection and the low acceleration voltage electron beam (EB M ) from the source (20) is used for pattern-formation.
摘要:
A method for determining focal properties in a target beam field of a charged-particle multi-beam processing apparatus is presented, where the focal properties relate to aperture images (53) formed by the beamlets (60) at or near the target (16) within this apparatus, such as height of focus, astigmatic length, or size of blur. By modifying an electrostatic voltage of a lens or another suitable operating parameter of the projection optics, the landing angles of the beamlets (60) are tilted by a small tilting angle, causing a small displacement of the positions where the beamlets hit the target surface. Using the amounts of displacement and the change of landing angles a map is generated that describes a mapping from the change of landing angles to the amounts of displacement as a function of the position, for instance by using a best fit to a predefined model; this map is then used to extract the focal properties, which in turn can be used to correct for imaging errors in the processing apparatus.