摘要:
When a semiconductor device having a multi-layered contact is fabaricated, the gate electrode is covered with a thick insulator film. A polycrystalline silicon film is formed in a state in which at least the gate electrode in the contact forming area is covered with a first oxidization-proof insulator film. An inter-layer insulator film is then formed in a state in which at least part of the polycrystalline silicon film is covered with a second oxidization-proof insulator film. A first contact hole is formed using the polycrystalline silicon film as an etching stopper, and the polycrystalline silicon film is then oxidized. Furthermore, a second contact hole is formed in the inter-layer insulator film on the upper surface of the second oxidization-proof insulator film using as the etching stopper the polycrystalline silicon film underlying the second oxidization-proof insulator film. Since the polycrystalline silicon film is formed under the inter-layer insulator film in the second contact forming area so as to cover the gate electrode, it acts as a stopper when the second contact is formed to thereby prevent a short circuit with the gate electrode even if there is no distance between the gate electrode and the second contact.
摘要:
In a semiconductor memory device, a storage node electrode having a cavity is provided such that the inner surface of a storage node electrode is used as a capacitor electrode. In a DRAM fabricating method, a storage node electrode having a cavity is formed by laminating a first conductor layer, an insulating film and a second conductor layer, which in turn are patterned into a desired shape, depositing a third conductor layer on the three-layer pattern, performing anisotropic etching so as to cause the third conductor layer to remain only on the side walls of the pattern to thereby form a box-shaped conductor, forming an opening in a part of the box-shaped conductor, removing the insulating film by an etching to thereby form a cavity.
摘要:
A semiconductor memory device wherein at least one of a storage node contact hole and a bit line contact hole includes a first contact hole made in a first inter-layer insulating film formed over a gate electrode and a second contact hole made in a second inter-layer insulating film formed over an electrically conductive material embedded up to a level higher than the gate electrode in the first contact hole which is contacted with the electrically conductive material, the conductive material being exposed by etching a part of the second inter-layer insulating film, whereby the size of the memory device can be made small and the reliability can be improved. Further, a capacitor is formed in a layer higher than a bit line thereby to facilitate the processing of a storage node electrode to increase the capacitor area and to improve the reliability since it is unnecessary to carry out patterning a plate electrode within a cell array. With the above construction, a short-circuiting between the embedded layers is removed and a good quality of the second inter-layer insulating film is formed.
摘要:
A semiconductor memory device wherein at least one of a storage node contact hole and a bit line contact hole includes a first contact hole made in a first inter-layer insulating film formed over a gate electrode and a second contact hole made in a second inter-layer insulating film formed over an electrically conductive material embedded up to a level higher than the gate electrode in the first contact hole which is contacted with the electrically conductive material, the conductive material being exposed by etching a part of the second inter-layer insulating film, whereby the size of the memory device can be made small and the reliability can be improved. Further, a capacitor is formed in a layer higher than a bit line thereby to facilitate the processing of a storage node electrode to increase the capacitor area and to improve the reliability since it is unnecessary to carry out patterning a plate electrode within a cell array. With the above construction, a short-circuiting between the embedded layers is removed and a good quality of the second inter-layer insulating film is formed.
摘要:
A vapor deposition mask (70) includes a first layer (71), a second layer (72) and a third layer (73) in this order. A plurality of first openings (71h), a plurality of second openings (72h) and a plurality of third openings (73h) are formed respectively in the first layer, the second layer and the third layer. The first openings, the second openings and the third openings communicate with each other, thereby constituting mask openings (75). The opening dimension of the second openings is larger than the opening dimension of the first openings and is larger than the opening dimension of the third openings. With this configuration, it is possible to prevent reduction of the opening dimension of the mask openings or clogging of the mask openings due to the vapor deposition particles adhering to the mask openings.
摘要:
A vapor deposition source (60), a plurality of control plates (80) and a vapor deposition mask (70) are disposed in this order. A substrate (10) is moved relative to the vapor deposition mask in a state in which the substrate and the vapor deposition mask are spaced apart at a fixed interval. Vapor deposition particles (91) discharged from a vapor deposition source opening (61) of the vapor deposition source pass through neighboring inter-control plate spaces (81) and mask openings (71) formed in the vapor deposition mask, and then adhere to the substrate to form a coating film (90). At least a part of the coating film is formed by the vapor deposition particles that have passed through two or more different inter-control plate spaces. It is thereby possible to form a coating film in which edge blur and variations in the thickness are suppressed.
摘要:
A vapor deposition device (50) in accordance with the present invention is a vapor deposition device for forming a film on a film formation substrate (60), the vapor deposition device including a vapor deposition source (80) that has an injection hole (81) from which vapor deposition particles are injected, a vapor deposition particle crucible (82) for supplying the vapor deposition particles to the vapor deposition source (80), and a rotation motor (86) for changing a distribution of the injection amount of the vapor deposition particles by rotating the vapor deposition source (80).
摘要:
A crucible (50) of the present invention includes: an opening (55a) from which vapor deposition particles are injected toward a film formation substrate on which a film is to be formed; a focal point member (54a), provided so as to face the opening (55a), which reflects vapor deposition particles injected from the opening (55a); and a revolution paraboloid (55b) which reflects, toward the film formation substrate, vapor deposition particles which have been reflected by the focal point member (54a).
摘要:
A vapor deposition particle emitting device of the present invention includes: a nozzle section (110) having emission holes (111) from which gaseous vapor deposition particles are emitted out; a heating plate unit (100), provided in the nozzle section (110), which is made up of heating plates (101) each having a surface on which a vapor deposition material remains as a result of adherence of vapor deposition particles to the surface; and a heating device (160) for heating the vapor deposition material, which is thus remaining on the surface of each of the heating plates (101), so that a temperature of the vapor deposition material is not less than a temperature at which to become transformed into gaseous form.
摘要:
A vapor deposition device (50) includes a mask (60) having periodic patterns, and only a region of the mask (60) where a one-period pattern is formed is exposed. A length of the mask base material along a direction perpendicular to a long-side direction of the mask base material is shorter than a length of a film formation substrate (200) along a direction of scanning of the film formation substrate (200). The mask (60) is provided so that the long-side direction of the mask base material is perpendicular to the direction of scanning and that the exposed region is allowed to move in a direction perpendicular to the direction of scanning by rotation of a wind-off roll (91) and a wind-up roll (92).