Abstract: A light-emitting device comprises a substrate; a first light-emitting unit and a second light-emitting unit formed on the substrate, each of the first light-emitting unit and the second light-emitting unit comprises a first semiconductor layer, a second semiconductor layer, and an active layer between the first semiconductor layer and the second semiconductor layer, wherein the first light-emitting unit comprises a first semiconductor mesa and a first surrounding part surrounding the first semiconductor mesa, and the second light-emitting unit comprises a second semiconductor mesa and a second surrounding part surrounding the second semiconductor mesa; a trench formed between the first light-emitting unit and the second light-emitting unit and exposing the substrate; a first insulating layer comprising a first opening on the first surrounding part and a second opening on the second semiconductor layer of the second light-emitting unit; and a connecting electrode comprising a first connecting part on the first

Abstract: A fire-fighting foam stock tank includes a stock solution tank, a bladder set inside the stock solution tank, and a liquid collecting pipe installed inside the bladder. The stock solution tank has a first end tank wall provided with a first maintenance hole and a first hole cover. There is a hole plug on the inner surface of the first hole cover, so that the hole plug extends into the first maintenance hole until it is close to the inner wall surface of the stock solution tank, so that the inner wall surface is kept flat. The liquid collecting pipe is a T-shaped pipe composed of a first pipe section and a second pipe section. The bladder fits the liquid collecting pipe shape.

Abstract: A fire-fighting foam stock tank includes a stock solution tank, a bladder set inside the stock solution tank, and a liquid collecting pipe installed inside the bladder. The stock solution tank has a first end tank wall provided with a first maintenance hole and a first hole cover. There is a hole plug on the inner surface of the first hole cover, so that the hole plug extends into the first maintenance hole until it is close to the inner wall surface of the stock solution tank, so that the inner wall surface is kept flat. The liquid collecting pipe is a T-shaped pipe composed of a first pipe section and a second pipe section. The bladder fits the liquid collecting pipe shape.

Abstract: A miniaturized particulate matter detector that includes a filter and a concentration detector is provided. The filter has a plurality of holes, and the concentration detector is correspondingly disposed under the filter. The concentration detector has a detected area used to detect a concentration of at least one miniaturized particulate matter. A manufacturing method of the filter is also provided.

Abstract: In an embodiment, a miniaturize particulate matter detector includes a filter having a plurality of holes, and a concentration detector correspondingly disposed under the filter. The concentration detector has a detect area used for detecting a concentration of at least one miniaturize particulate matter. A manufacturing method of the filter is also provided.

Abstract: In an embodiment, a miniaturize particulate matter detector includes a filter having a plurality of holes, and a concentration detector correspondingly disposed under the filter. The concentration detector has a detect area used for detecting a concentration of at least one miniaturize particulate matter. A manufacturing method of the filter is also provided.

Abstract: A miniaturized particulate matter detector that includes a filter and a concentration detector is provided. The filter has a plurality of holes, and the concentration detector is correspondingly disposed under the filter. The concentration detector has a detected area used to detect a concentration of at least one miniaturized particulate matter. A manufacturing method of the filter is also provided.

Abstract: A foam tank structure includes a foam tank, a bag and a foam tube, in which the foam tank is equipped with a manhole and a hole cover, and the upper and lower tank walls are individually placed with a foam injection hole, an inlet opening and a drain opening; the bag is integrated with the hollow bag body within the foam tank, and the upper and lower ends individually connect with a foam injection hole, particularly, the bag has double bag walls forming interlayer space therebetween, and plural anti-wear items integrate within the interlayer space; and the foam tube is installed within the bag and connects the foam injection hole of the foam tank, and plural open-apertures are placed at the tube wall; thereby providing a foam tank structure which improves the durability and operating life of the bag.

Abstract: A method for producing of ultra-clean and high-purity electronic acetic acid is disclosed. The method including following steps: Step 1, industrial acetic acid is fast distilled; Step 2, filtering the fraction by membrane of 0.05˜0.3 ?m aperture; Step 3, rectification; Step 4, membrane filtration again. Due to the adoption of the technical scheme above, the ultra-clean and high-purity electronic grade acetic acid which purity is 99.8% is produced. The content of single metal ion is lower than 1 ppb and the content of particulates which is ?0.5 ?m is lower than 5 pcs/ml. The method of the invention will help to reduce energy consumption, to simplify the operation, and to achieve the high security.

Abstract: A method of manufacturing ultra-pure sulfuric acid is described. Industrial sulfur trioxide is used as the raw material, gasifying it in a round gasifier, getting it gasified for the second time after condensation, sulfur trioxide gas has been purified. Absorbing the sulfur trioxide gas with the dilute sulfuric acid circularly, collect the target product of ultra-pure sulfuric acid. The main content of the ultra-pure sulfuric acid obtained by the method of the present invention can reach more than 96 wt %, the content of the impurities of metal ions, is in conformity with the SEMI C12 standard.

Abstract: A foam tank structure improvement includes a foam tank, a bag and a foam tube, in which the foam tank is equipped with a manhole and a hole cover, and the upper and lower tank walls are individually placed with a foam injection hole, an inlet opening and a drain opening; the bag is integrated with the hollow bag body within the foam tank, and the upper and lower ends individually connect with a foam injection hole, particularly, the bag has double bag walls forming interlayer space therebetween, and plural anti-wear items integrate within the interlayer space; and the foam tube is installed within the bag and connects the foam injection hole of the foam tank, and plural open-apertures are placed at the tube wall; through the foam tank structure improvement of the present invention, the effect of improving the durability and operating life of the bag is achieved.