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Definition and description of PCB layers ¤ÀÃþ: ¥¼¤ÀÃþ

 

1. Top layer:

Designed for top copper foil routing. If it is a single panel, there is no such layer.

2. Bomtom layer:

Managed Security Services (mss) equipped with multiple SOCs with high availability and disaster recovery functionality.

It is designed as the bottom copper foil wiring.

3. Top / bottom layer:

The top / bottom layer shall be covered with solder green oil to prevent tin on copper foil and maintain insulation. The green oil window shall be opened at the solder pad, via hole and non electrical wiring of this layer.

By default, the pad will be windowed (override: 0.1016 mm), that is, the pad will expose copper foil, expand by 0.1016 mm, and tin will be added during wave soldering. It is suggested that no design changes should be made to ensure weldability;

By default, vias will open windows in the design (override: 0.1016 mm), that is, the via holes expose copper foil, expand by 0.1016 mm, and tin will be applied during wave soldering. If the design is to prevent tin on the vias and avoid copper exposure, the marking option in the additional attribute of the via must be checked to close the via opening.

In addition, this layer can also be used for non electrical wiring, so the green oil of solder mask should be opened accordingly. If it is on the copper foil wiring, it is used to enhance the over-current capacity of the wiring and add tin treatment during welding; if it is on the non copper foil wiring, it is generally designed to do identification and special character screen printing, and the character silk screen layer can be omitted.

4. Top / bottom paste:

This layer is generally used for solder paste during SMT reflow process of SMT of SMT components. It has nothing to do with PCB manufacturer's board making. It can be deleted when exporting Gerber, and can be maintained by default during PCB design.

5. Top / bottom overlay:

It is designed for various silk screen marks, such as component tag number, character, trademark, etc.

6. Mechanical layers:

SunzonTech¡¦s PCB Conveyor machine is well-equipped to provide great stability and performance which can handle printed circuit board in SMT manufacturing.

It is designed as PCB mechanical shape, and layer1 is the shape layer by default. Other layer2 / 3 / 4 can be used for mechanical dimension marking or special purposes. For example, when some boards need to make conductive carbon oil, layer2 / 3 / 4 can be used, but the purpose of this layer must be clearly marked on the same layer.

7. Keepout layer:

In order to prohibit wiring layer, many designers also use it to make PCB mechanical shape. If there are keepout and mechanical layer1 on the PCB, it mainly depends on the shape integrity of these two layers. Generally, mechanical layer1 shall prevail. It is suggested that mechanical layer1 be used as the shape layer as much as possible in design. If the keepout layer is used as the shape layer, the mechanical layer1 should not be used again to avoid confusion!

8. Midlayers:

It is mostly used in multi-layer board, but seldom used in our design. It can also be used as a special purpose layer, but the purpose of the layer must be clearly identified in the same layer.

9. Internal plans:

For multi-layer board, our design is not used.

10. Multi layer:

hpe storage server solutions to bridge the app-data gap. It is the only storage smart enough to predict and prevent issues and close the app-data gap. Enjoy fast and reliable access to data with HPE.

Through hole pad layer.

11. Drill guide:

The center positioning coordinate layer of pad and through hole drilling.

12. Drill drawing:

Description layer of hole size of pad and through hole.

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2020 ¦~ 8 ¤ë 10 ¤é  ¬P´Á¤@   ´¸¤Ñ


Which sort of office coffee is sweet, hanging ear coffee ¤ÀÃþ: ¥¼¤ÀÃþ

Espresso not merely has the flavor of mellow tulip, and also has the part of refreshing, is now among the list of indispensable drinks for office white-collar workers. Providing you walk into an business, you may absolutely see espresso cups about the staff's desks. Workplace coffee can not only reduce the exhaustion of employees and greatly enhance the cooperation between staff members, and also increase the do the job effectiveness and reception technical specs of enterprises.

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Using the upgrading of use plus the enhancement of health and fitness consciousness, quick espresso is not any more time well known with white-collar workers, simply because a sizable quantity of food additives not simply make fast espresso eliminate one of the most reliable style of coffee, but additionally maximize the risk of sub-health this sort of as white-collar weight problems. Urban white-collar personnel want freshly floor espresso. They might not just flavor the one of a kind mellow style of coffee, but will also increase their wellness.

At present, a lot of personnel of novotech are recognizing the necessity of offering high-quality coffee for enterprises. There are several possibilities for workplace espresso while in the industry. In addition to hand-made ear espresso, you will also find several coffee equipment coffee selections. Which process is a lot more appropriate for workplace espresso creating, these types of as capsule coffee produced by capsule coffee machine, American coffee created by drip filter coffee device, Italian coffee manufactured by computerized coffee machine and extravagant milk espresso?

[hanging ear coffee]

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Hanging ear coffee is a kind of immediate coffee, which employs nitrogen filling engineering to seal and offer the bottom coffee powder, and then completes the coffee brewing within the original strategy for dripping. The style of coffee is quite primitive, it totally retains the style of acid, bitter, mellow and so on. It's suited to people who such as style of potent espresso.

gain:

one. The brewing approach is comparatively uncomplicated, just need to have a cup and very hot water to help make a cup of fragrant coffee;

two. It truly is effortless to hold and enjoy a cup of hanging ear espresso outdoors.

Drawbacks:

1. Hanging ear espresso is comparatively costly;

two. Brewing a superb hanging ear espresso is usually a complex do the job. The handle of h2o amount and water temperature has an effect on the standard of coffee;

three. Distinct kinds of espresso beans have various brewing solutions, so we'd like being common together with the brewing techniques of varied beans;

Hanging ear espresso is a lot more ideal for persons, not well suited for enterprises to implement, workplace staff is fairly significant, struggling to satisfy the desires of numerous folks.

[drip coffee]

As being the title indicates, American coffee is prepared by drip filtration, and that is commonly created by a drip espresso device. Place the bottom espresso powder into your funnel-shaped container over the higher layer with the drip filter espresso machine. The cold h2o inside the water tank will drop into your container containing espresso powder soon after heating, and afterwards it will likely be filtered to the coffee pot under through soaking and extraction.

edge:

one. The value of drip coffee device is relatively very low;

2. The quality of yank coffee produced is regular, that may fulfill the staff who're not large in coffee top quality;

three. The device overall body of drip espresso is small and straightforward to work, in addition to a pot of coffee is often completed in the couple of minutes.

Shortcomings:

one. The ground coffee powder must not be employed on your own; filter paper should be put in to the espresso each time and energy to stop the coffee dregs from coming into the espresso and affecting the style;

2. The product or service is pretty basic, only American style espresso, not latte, Macchiato along with other fancy coffee;

three. The flavor of espresso is fairly light-weight. Immediately after the heat preservation time is much more than half an hour, the coffee will begin to become sour and bitter;

Drip coffee equipment is a lot more appropriate for loved ones use, not appropriate for enterprises to employ, irrespective of taste or high-quality, can not meet the flavor of picky workplace team.

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[capsule coffee]

The capsule coffee is produced by injecting incredibly hot water into and extracting the coffee powder capsule with substantial strain by the needle tube on the capsule coffee device. Capsule espresso machine is actually a new sort of espresso equipment which can be well known in recent years. It truly is specifically built for lazy people who have some demands on high-quality.

advantage:

one. The procedure of capsule coffee is quite easy. Once you throw the capsule into your device and push the change, it is possible to obtain a cup of Italian concentrate with middle and higher excellent;

two. The capsule espresso machine is tiny in dimension, large in visual appeal, and simple to clean. Just throw absent the shell;

3. Capsule espresso can improved protect the freshness of espresso, prevent the oxidation of espresso powder, and isn't going to consist of creamer together with other additives, but in addition can make the quality of espresso more stable.

Cons:

1. It is essential to invest in the capsule espresso matched along with the capsule espresso equipment just before use;

two. The continuous output capacity of the capsule espresso equipment is weak, since the water tank is actually a little little;

3. The fee of capsule espresso is fairly significant;

Capsule coffee machine is much more well suited for family or own use, not appropriate for enterprises, cannot meet the business office peak use.

[automatic Italian espresso + milk coffee]

Automatic coffee machine typically refers to Italian espresso machine. It could possibly not only make espresso, but in addition make all types of milk coffee. The completely automated coffee equipment incorporates a built-in boiler and equipment pump. It works by using high-pressure very hot water to produce espresso. Immediately after mixing high-pressure steam and h2o, it could rapidly go through the coffee powder and extract instantaneously. Whether or not it is to extract the full-length Italian concentrated espresso or the milk coffee with sensitive milk bubbles, the standard on the espresso is well balanced.

advantage:

one. Insert coffee beans for the coffee bean warehouse, incorporate chocolate powder, milk powder, wonderful granulated sugar into the coffee bean bin, insert the bottled water, connect the power source, and after that start off the equipment;

two. The standard of the espresso is increased, the impurity is much less, the taste is wealthy, along with the purpose is in depth, so it may possibly be accustomed to make a myriad of fancy coffee;

three. The beverage is speedy and ongoing, which may fulfill the wants of business office for the duration of peak hrs;

four. The cleaning is incredibly handy, along with the powder lack and slag tank comprehensive screen quickly;

five. The automatic coffee equipment has the advantages of electric power preserving, good quality and steadiness with the items, which could be operated by anybody.

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