Canon Kabushiki Kaisha

Toshiyasu Shirasuna

Hitoshi Murayama

Kazuyoshi Akiyama

Ryuji Okamura

Kazuto Hosoi

Kazuhiko Takada

Tatsuyuki Aoike

Daisuke Tazawa

Yukihiro Abe

Hiroaki Niino

Makoto Aoki

Tetsuya Takei

Hiroyuki Katagiri

Takashi Otsuka

Yuu Nishimura

Takashi Ohtsuka

Shigeru Shirai

Shinji Tsuchida

Junichiro Hashizume

Hironori Owaki

Yoshio Segi

Jun Ohira

Motoya Yamada

Masaaki Yamamura

There is provided a method for controlling an electrophotographic apparatus including forming a first measurement image by performing first halftone processing on image data, forming a second measurement image by performing second halftone processing different from the first halftone processing on the image data, measuring densities of the first measurement image and the second measurement image, calculating a density difference between each of densities of the measurement images, determining whether the density difference satisfies a predetermined reference value, and applying a surface treatment on an electrophotographic photosensitive member if the density difference does not satisfy the reference value, during a non-image formation period.

Method for controlling electrophotographic apparatus

A surface layer of the electrophotographic photosensitive member has a change region in which a ratio of the number of carbon atoms with respect to the sum of the number of silicon atoms and the number of carbon atoms gradually increases toward a surface side of the electrophotographic photosensitive member from a photoconductive layer side, wherein the change region has an upper charge injection prohibiting portion containing a Group 13 atom, and a surface-side portion which is positioned closer to the surface side of the electrophotographic photosensitive member than the upper charge injection prohibiting portion and does not contain the Group 13 atom, and the distribution of the Group 13 atom in a boundary portion between the surface-side portion and the upper charge injection prohibiting portion is precipitous.

Electrophotographic photosensitive member, method for manufacturing the same, and electrophotographic apparatus

In a plasma treatment method of and apparatus for treating the surface of a treatment target substrate by utilizing glow discharge produced by supplying high-frequency power into an inside-evacuated reactor through a high-frequency power supply means, a plurality of impedance regulation means for regulating impedances on the side of the reactor and on the side of the high-frequency power supply means are provided correspondingly to the impedances of a plurality of reactors, and the high-frequency power is supplied into the reactors via the impedance regulation means corresponding to the reactors. Plasma treatment can be made in a good efficiency and a low cost on a plurality of reactors having different impedances.

Plasma treatment method

A vacuum processing method including placing an article to be processed in a reaction container and simultaneously supplying at least two high-frequency powers having different frequencies to the same high-frequency electrode to generate plasma in the reaction container by the high-frequency powers introduced into the reaction container from the high-frequency electrode. The frequencies and power values of the at least two high-frequency powers supplied satisfy a required relationship.

Vacuum processing apparatus in which high frequency powers having mutually different frequencies are used to generate plasma for processing an article

For enhancing plasma uniformity and long-term stability so as to readily form a film with excellent uniformity of thickness and quality and with good repeatability and for suppressing occurrence of image defects and drastically increasing the yield to form a deposited film ready for volume production, particularly, a functional deposit film (for example, an amorphous semiconductor used for semiconductor devices, electrophotographic photosensitive members, photovoltaic devices, and so on) is formed in an apparatus including a reaction vessel which can be hermetically evacuated, a substrate holder in the reaction vessel, a source gas supply, a power supply for high-frequency power. An end covering member is provided at an end of each of the substrate holder, the source gas supply and the power supply.

Deposited film forming apparatus and deposited film forming method

A vacuum processing method that includes placing an article to be processed in a reaction container and simultaneously supplying at least two high-frequency powers having mutually different frequencies to at least one high-frequency electrode to generate plasma in the reaction container by the high-frequency powers introduced into the reaction container from the high-frequency electrode(s), thereby processing the article. The frequencies and power values of the at least two high-frequency powers supplied satisfy required relationships.

Vacuum processing method and semiconductor device manufacturing method in which high-frequency powers having mutually different frequencies are applied to at least one electrode

To plasma-process a substrate having a large area uniformly at a high process speed to form a deposition film with uniform thickness and quality and favorable characteristics. A first high frequency power (with a frequency fand a power P) and a second high frequency power (with a frequency fand a power P) supplied to an electrode from a first high frequency power supply and a second high frequency power supply, respectively, are set so that the frequencies are equal to or higher than 10 MHz and equal to or lower than 250 MHz, a ratio of the frequency fto the frequency f(f/f) is equal to or higher than 0.1 and equal to or lower than 0.9, and a ratio of the power Pto a total power (P+P) is equal to or higher than 0.1 and equal to or lower than 0.9. The frequency fis changed during processing the substrate.

Plasma processing method and method for manufacturing semiconductor device

Plasma treatment apparatus

Deposited film forming apparatus

Vacuum processing method

A plasma processing method comprising the steps of arranging a substrate on a film is to be formed in a reaction chamber capable of being vacuumed and evacuating the inside of the reaction chamber in a loading stage; and separating the reaction chamber from the loading stage and joining the reaction chamber to a treating stage where the substrate arranged in the reaction chamber is subjected to plasma processing, wherein the reaction chamber is moved on a track to join to the treating stage, where a high frequency power supply system, a processing gas supply system and an exhaustion system are joined to the reaction chamber, whereby plasma is produced in the reaction chamber to conduct plasma processing on the substrate. An apparatus suitable for practicing said plasma processing method.

Plasma processing apparatus

Apparatus and method for forming deposited film

For making it feasible to suit to vacuum processing utilizing a system consisting of an exhaust section and a separable vacuum processing vessel section, to ensure flexibility of production, to prevent dust from attaching onto an article, so as to achieve increase in non-defective percentage of vacuum-processed articles, and also to suppress variability in vacuum processing characteristics among lots, an article is loaded into a movable vacuum processing vessel section, the vacuum processing vessel section is preliminarily pressure-reduced and moved, the vacuum processing vessel section is connected to an exhaust section, and communication is established between the vacuum processing vessel section and the exhaust section to perform vacuum processing. A first opening provided in the vacuum processing vessel section is connected to a second opening provided in the exhaust section and a vacuum seal valve of the first opening which is openable and closable, is opened. When opening the valve, the internal pressure of the vacuum processing vessel under reduced pressure is set higher than the pressure of another pressure-reduced space to be brought into communication therewith by the opening of the valve.

Vacuum processing methods

A film-forming apparatus is provided which comprises a reaction chamber capable of being vacuumed and having a reaction space in which a plurality of substrates can be arranged on a common circumference to establish an inner space circumscribed by the plurality of substrates. A film-forming raw material gas can be introduced into the inner space. A first electrode for supplying a high frequency power into the inner space is provided at a central position in the inner space circumscribed by the plurality of substrates. A second electrode is provided outside the plurality of substrates arranged on the common circumference. A shielding member having a dielectric portion constituted by a dielectric material is provided between the second electrode and the plurality of substrates arranged on the common circumference. The shielding member substantially shields the film-forming raw material gas so that it is confined inside the shielding member and transmits a high frequency power supplied to the second electrode into the inner space.

Growing community of inventors

Nara, Japan

Toshiyasu Shirasuna