Showing papers on "Substrate (printing) published in 2018"

Display panel and display device

Abstract: The invention discloses a display panel and a display device. The display panel comprises a substrate and a cover plate which are oppositely arranged, wherein a first electrode, a second electrode andan organic light-emitting layer are arranged between the cover plate and the substrate; the organic light-emitting layer is located between the first electrode and the second electrode; the organic light-emitting layer comprises a hole injection layer; magnetic nanoparticles are doped in the hole injection layer; and the magnetic nanoparticles are used for enabling the hole injection layer to form spin polarization injection under the action of an external magnetic field. According to the display panel and the display device provided by the invention, the proportion of singlet state excitonsand triplet state excitons is improved, so that the luminous efficiency of the display panel is improved, and the luminous brightness and the service life of the display panel are improved and prolonged.

Printable Transparent Conductive Films for Flexible Electronics.

Abstract: Printed electronics are an important enabling technology for the development of low-cost, large-area, and flexible optoelectronic devices. Transparent conductive films (TCFs) made from solution-processable transparent conductive materials, such as metal nanoparticles/nanowires, carbon nanotubes, graphene, and conductive polymers, can simultaneously exhibit high mechanical flexibility, low cost, and better photoelectric properties compared to the commonly used sputtered indium-tin-oxide-based TCFs, and are thus receiving great attention. This Review summarizes recent advances of large-area flexible TCFs enabled by several roll-to-roll-compatible printed techniques including inkjet printing, screen printing, offset printing, and gravure printing using the emerging transparent conductive materials. The preparation of TCFs including ink formulation, substrate treatment, patterning, and postprocessing, and their potential applications in solar cells, organic light-emitting diodes, and touch panels are discussed in detail. The rational combination of a variety of printed techniques with emerging transparent conductive materials is believed to extend the opportunities for the development of printed electronics within the realm of flexible electronics and beyond.

Cold spray additive manufacturing and repair: Fundamentals and applications

Abstract: Cold spray is a solid-state coating deposition technology which has recently been applied as an additive manufacturing process to fabricate individual components and to repair damaged components. In comparison with fusion-based high-temperature additive manufacturing processes, cold spray additive manufacturing (CSAM) has been shown to retain the original properties of the feedstock, to produce oxide-free deposits, and to not adversely influence underlying substrate materials during manufacture. Therefore, CSAM is attracting considerable attention from both scientific and industrial communities. Although CSAM is an emerging additive manufacturing technology, a body of work has been carried out by various research groups and the technology has been applied across a range of manufacturing areas. The purpose of this paper is to systematically summarize and review the CSAM-related work to date.

Metallic molybdenum disulfide nanosheets-based electrochemical actuators

Abstract: An actuator comprising a flexible substrate having a surface comprising one or more active regions, each of the active regions having disposed thereon an electrochemically active film comprising a plurality of 1T phase 2D MoS2 nanosheets which impart a first force upon the flexible substrate in response to electrochemical charging of ions in the 2D MoS2 nanosheets and impart a second force upon the flexible substrate in response to electrochemical discharging of ions in the 2D MoS2 nanosheets, wherein the first and second forces imparted to the flexible substrate each being sufficient to displace the flexible substrate. The flexible substrate may comprise a polymer substrate and the electrochemically active film may comprise a conductive layer having disposed thereon the plurality of 1T phase 2D MoS2 nanosheets.

Substrate processing apparatus and method of manufacturing semiconductor device

Abstract: A substrate processing apparatus includes a substrate support having a central first upper surface and a second upper surface surrounding the first upper surface and formed higher than the first upper surface, and an exhaust duct surrounding the substrate support, wherein a first through hole and a second through hole are formed in the substrate support, the first through hole being formed through the substrate support from the first upper surface, the second through hole connecting the first through hole and a side surface of the substrate support.

Numerical modeling of the strand deposition flow in extrusion-based additive manufacturing

Abstract: We propose a numerical model to simulate the extrusion of a strand of semi-molten material on a moving substrate, within the computation fluid dynamics paradigm. According to the literature, the deposition flow of the strands has an impact on the inter-layer bond formation in extrusion-based additive manufacturing, as well as the surface roughness of the fabricated part. Under the assumptions of an isothermal Newtonian fluid and a creeping laminar flow, the deposition flow is controlled by two parameters: the gap distance between the extrusion nozzle and the substrate, and the velocity ratio of the substrate to the average velocity of the flow inside the nozzle. The numerical simulation fully resolves the deposition flow and provides the cross-section of the printed strand. For the first time, we have quantified the effect of the gap distance and the velocity ratio on the size and the shape of the strand. The cross-section of the strand ranges from being almost cylindrical (for a fast printing and with a large gap) to a flat cuboid with rounded edges (for a slow printing and with a small gap), which substantially differs from the idealized cross-section typically assumed in the literature. Finally, we found that the printing force applied by the extruded material on the substrate has a negative linear relationship with the velocity ratio, for a constant gap.

Display panel and display device

Abstract: The utility model discloses a display panel and display device, this display panel, include: the substrate base plate is located the luminescent layer on the substrate base plate to and lie in the beam spreading layer that the luminescent layer goes out plain noodles one side, wherein, the luminescent layer includes a plurality of array arrangement's of being pixel, and each pixel is at least including luminescence units red, green, three kinds of different colours in the indigo plant, the beam spreading layer includes the beam spreading component that corresponds with at least one pixel, andthe beam spreading component is used for enlarging corresponding pixel's light -emitting light beam. Because the beam spreading component in the beam spreading layer can enlarge corresponding pixel'slight -emitting light beam, the light -emitting every detail that has increased this display panel is long -pending, has reduced the number of luminescence unit, has reduced display panel's consumption to reduce display panel's fever screen rate, moreover, also reduced the requirement to mask version precision, make jumbo size display panel make more easily.

Laminated Object Manufacturing of 3D‐Printed Laser‐Induced Graphene Foams

Abstract: Laser-induced graphene (LIG), a graphene structure synthesized by a one-step process through laser treatment of commercial polyimide (PI) film in an ambient atmosphere, has been shown to be a versatile material in applications ranging from energy storage to water treatment. However, the process as developed produces only a 2D product on the PI substrate. Here, a 3D LIG foam printing process is developed on the basis of laminated object manufacturing, a widely used additive-manufacturing technique. A subtractive laser-milling process to yield further refinements to the 3D structures is also developed and shown here. By combining both techniques, various 3D graphene objects are printed. The LIG foams show good electrical conductivity and mechanical strength, as well as viability in various energy storage and flexible electronic sensor applications.

Wearable Wireless Tyrosinase Bandage and Microneedle Sensors: Toward Melanoma Screening

Abstract: Wearable bendable bandage-based sensor and a minimally invasive microneedle biosensor are described toward rapid screening of skin melanoma. These wearable electrochemical sensors are capable of detecting the presence of the tyrosinase (TYR) enzyme cancer biomarker in the presence of its catechol substrate, immobilized on the transducer surface. In the presence of the surface TYR biomarker, the immobilized catechol is rapidly converted to benzoquinone that is detected amperometrically, with a current signal proportional to the TYR level. The flexible epidermal bandage sensor relies on printing stress-enduring inks which display good resiliency against mechanical deformations, whereas the hollow microneedle device is filled with catechol-coated carbon paste for assessing tissue TYR levels. The bandage sensor can thus be used directly on the skin whereas microneedle device can reach melanoma tissues under the skin. Both wearable sensors are interfaced to an ultralight flexible electronic board, which transmits data wirelessly to a mobile device. The analytical performance of the resulting bandage and microneedle sensing systems are evaluated using TYR-containing agarose phantom gel and porcine skin. The new integrated conformal portable sensing platforms hold considerable promise for decentralized melanoma screening, and can be extended to the screening of other key biomarkers in skin moles.

Inkjet printing metals on flexible materials for plastic and paper electronics

Abstract: Inorganic printed electronics is now recognized as an area of tremendous commercial, potential and technical progress. Many research groups are actively involved worldwide in developing metal nanoparticle inks and precursors for printing inorganic/organic materials using different printing techniques. This review article focuses on inkjet printed metal structures and their applications. It comprises ink formulation, optimal droplet formation as well as adhesion of the printed patterns at the underlying substrate and post-treatment like sintering to be considered in the initial ink design. Besides some examples demonstrating aspects on ink formulation via patterning solid surfaces such as glass and silicon oxide, special emphasis will be placed on compatibility for usage in plastic and paper electronics. Printing of nanoparticles of copper, silver, gold etc. will be discussed and will be compared to printing of a variety of metal–organic precursor inks. Finally, a brief account on exemplary applications using the printed inorganic nanoparticles/materials is provided.

Substrate processing apparatus

Abstract: PROBLEM TO BE SOLVED: To improve the uniformity of gas flow in a process container and the uniformity of the temperature in the process container.SOLUTION: A substrate processing apparatus 1 performs processing to a wafer W and includes: a process container 10 that stores the wafer W in an airtight manner; a placement base 11 where a substrate is placed in the process container 10; and an exhaust mechanism 80 which exhausts air in the process container 10. The process container 10 includes: a body part 20 with a closed bottom which opens on an upper surface; a cylindrical part 22 including a flange 21 which closes the upper surface of the body part 20 in an airtight manner and a side wall 40 having a diameter which is smaller than that of the body part 20 and larger than an outer surface of the placement base 11; and a lid 23 which is provided on an upper surface of the flange 21 and closes an opening of the body part 20 in an airtight manner. A heater 42 is disposed at a groove part 41 on the upper surface of the flange 21. An engagement member 43 which protrudes toward a center direction of the side wall 40 is provided at a lower end of the side wall 40 of the cylindrical part 22. A baffle plate 44 in which multiple openings 44a are formed is disposed on an upper surface of the engagement member 43.

Roll-to-Roll Fabrication of Solution Processed Electronics

Abstract: The production of electronic devices using solution based (“wet”) deposition technologies has some decisive technical and commercial advantages compared to competing approaches like vacuum based (“dry”) manufacturing. Particularly, the potential to scale up production processes to large areas and high volumes by introducing continuous roll-to-roll (R2R) methods on flexible substrates has been the topic of intense studies from both applied research institutes and industry already for some years. Decisive steps forward have been achieved during that time, resulting in the dawn of commercial applications for a number of processes, while additional development work is still needed in some other fields. This review summarizes the work published during the last few years on the R2R printing and wet coating of electronic devices. An overview is presented of the basic operational principles for the most commonly used R2R printing and coating methods and techniques for proper web handling in R2R lines. Then, the most commonly used types of flexible substrate materials are introduced, followed by a review of the work published in the application areas of transparent conductor materials, printed electric connections, light emitting devices, photovoltaic energy generation, printed logic, and sensing.

Flexible display device

Abstract: A flexible display device comprises a main body, a gas transportation device, and a flexible module comprising a flexible panel and a soft cushion The flexible panel comprises a flexible substrate having a first surface and a second surface, and a display assembly The display assembly is disposed on the first surface The soft cushion is adhered on the second surface The gas transportation device is disposed in the main body The gas transportation device has a gas inlet and a gas outlet communicated with the soft cushion The flexible module is received by a receiving space When the flexible panel and the soft cushion are unfolded outwardly, gas is inputted from the gas inlet and transmitted to the soft cushion through the gas outlet, so that the soft cushion is inflated, and the flexible panel is stably supported by the soft cushion and not easy to be deformed

Method of depositing thin film

Abstract: A thin film deposition method according to an embodiment of the present invention includes a step of preparing a substrate on which a pattern is formed in a process chamber; a first thin film deposition step of depositing a thin film by supplying a first process gas and a second process gas; a second thin film deposition step of stopping the supply of the second process gas and making the second process gas remaining in the lower portion of the pattern react to the first process gas while maintaining the supply of the first process gas to deposit a thin film; and a first purge step of stopping the supply of the first process gas and purging a residual gas by supplying a purge gas into the process chamber. It is possible to improve the step coverage of the thin film.

An inkjet printed Ag electrode fabricated on plastic substrate with a chemical sintering approach for the electrochemical sensing of hydrogen peroxide

Abstract: The trend of developing electrochemical sensors toward cellular level detection put forward higher requirements of the electrodes in the detection performance. However, common disk electrodes or conventional screen printing electrodes meet up with some limitations in the electrocatalytic activity and electron transfer capability. In this work, we applied inkjet printing technology to fabricate electrodes to make some improvements. Highly conductive Ag nanoparticles based electrodes were obtained on plastic substrate by inkjet printing technology followed by a sintering process at room temperature. The resistivity of IPAgE is determined to be 64.0 ± 5.3 μΩ cm. With better conductivity and the nanoparticle-based interface, superb electrochemical response of IPAgE for H 2 O 2 was obtained, nearly 300-fold higher than the conventional screen printed Ag electrode. Moreover, high sensitivity of 287 μA mM −1 cm −2 with a LOD of 5.0 μM was obtained under the optimized 20 printed layers. The inkjet printed Ag electrodes were also credibly applied in the detection of H 2 O 2 release from living cells. This work demonstrates inkjet printing is a promising method for the high performance electrochemical sensors.

Method for depositing oxide film by thermal ald and peald

Abstract: A method for depositing an oxide film on a substrate by thermal ALD and PEALD, includes: providing a substrate in a reaction chamber; depositing a first oxide film on the substrate by thermal ALD in the reaction chamber; and without breaking a vacuum, continuously depositing a second oxide film on the first oxide film by PEALD in the reaction chamber.

Transparent and Self-Powered Multistage Sensation Matrix for Mechanosensation Application.

Abstract: Electronic skin based on a multimodal sensing array is ready to detect various stimuli in different categories by utilizing highly sensitive materials, sophisticated geometry designs, and integration of multifunctional sensors. However, it is still difficult to distinguish multiple and complex mechanical stimuli in a local position by conventional multimodal E-skin, which is significantly important in the signals’ feedback of robotic fine motions and human–machine interactions. Here, we present a transparent, flexible, and self-powered multistage sensation matrix based on piezoelectric nanogenerators constructed in a crossbar design. Each sensor cell in the matrix comprises a layer of piezoelectric polymer sandwiched between two graphene electrodes. The simple lamination design allows sequential multistage sensation in one sensing cell, including compressive/tensile strain and detaching/releasing area. Further structure engineering on PDMS substrate allows the sensor cell to be highly sensitive to the app...

Exhaust apparatus, and substrate processing apparatus and thin film fabricating method using the same

Abstract: An exhaust apparatus using a gas curtain instead of a mechanical opening/closing structure is provided The exhaust apparatus includes: a first region; a second region connected to the first region; a third region connected to the first region; and a first gas supply line connected to the second region When gas is supplied to the first gas supply line, the first region does not communicate with the second region but communicates with the third region Therefore, the exhaust apparatus can prevent generation of reactive byproducts through selective exhaust

Substrate processing device, method for manufacturing semiconductor device and recording medium

Abstract: A substrate processing apparatus includes a first processing module including a first processing module, a second processing module, a first utility system adjacent to a back surface of the first processing module, and a second utility system adjacent to a back surface of the second processing module, a first exhaust box of the first utility system and a second exhaust box of the second utility system being disposed to face each other across a maintenance area located behind a part of the back surface of the first processing module that is close to the second processing module and behind a part of the back surface of the second processing module that is close to the first processing module, and a first supply box of the first utility system and a second supply box of the second utility system being disposed to face each other across the maintenance area.

Substrate treatment apparatus, gas nozzle, and semiconductor device manufacturing method

Abstract: [Problem] To make it possible to improve uniformity among the surfaces of substrates. [Solution] The present invention is provided with: a treatment chamber for treating a plurality of substrates; and a nozzle for supplying the inside of the treatment chamber with a gas. The nozzle has a slit opened in the lengthwise direction, and the slit is formed to the top of the leading end portion of the nozzle.

The impact of AA7075 cold spray coating on the fatigue life of AZ31B cast alloy

Abstract: To improve the fatigue resistance of magnesium alloys, AA7075 powder, which has high fatigue strength and high adhesion strength, was successfully coated on as-cast AZ31B substrate. The coating proved to be dense, with a porosity of