In some occasions, you will have to write an essay in the extremely short amount of time on the exam in college or high school. Also, you may be a little bit of a procrastinator, and find yourself in a situation when the paper is due tomorrow morning, and you have not even chosen the topic yet. Even though a last-minute essay cannot look as great as a work prepared successively and carefully within the whole time given, you still have a chance to submit a decent paper. The working process will require your full attention and a lot of effort, even if you are assigned a simple essay. However, if you learn the next few tips, the essay writing will seem significantly easier and feasible even when you are short on time.

Firstly, clean up your working space to get started. Make sure you have everything you need on the table, take a pen, a few sticky notes, your laptop, and read through the assignment requirements. In case no prompt is given, search for good essay topics, and pick a few uncommon and interesting ones you will be able to write about. Making a final choice, think which topic is the most relevant to your current studies and will not take too much to research.

Afterwards, look for the most trustworthy sources or the ones you are certainly allowed to use. If you are not sure, access the online library or any free services where you can look for the books and articles for your essay. Use sticky notes to write down the information and put them in front of you to see how much data has been gathered and if you need to continue researching. Reread these notes from time to time and cross out the info you do not find relevant anymore.

When you have the data you need to produce a quality work, it is crucial to think about the structure of the future paper. If you are not sure how to write an essay outline properly, check what your essay type is first. Each type is organized differently, so you need to look up the structure every time you are given an essay homework. You can also search for an example of the essay on your topic, and adhere to its outline. No matter what kind of essay you are going to write, it is important to start with a thesis statement. It should declare what problem you will review in the paper, and which facts or arguments you will use to do it professionally. As these arguments will be discussed in the main part of the essay, outline the body paragraphs and put down a few sentences with the rough description of each paragraph. Think of the way you will engage the reader in the introduction, and which thought will be conclusive for the paper. When the direction of the work is clear from the outline, use it to draft the first version of the essay.

If you are not used to model essay writing, do not worry - your draft should not necessarily look like a masterpiece. It is only the depiction of your thoughts, and as you will have them written down, it will be easier to create a good essay. There is no best way to write an essay, so trust the working methods you usually use. You may like taking short breaks once in a few minutes, or write everything in one sit - just make sure to keep the focus on writing and avoid the urge to call a friend or watch something online. Thus, you will finish the paper faster, and will not feel guilty for engaging in other activities afterwards.

Do not forget to go through the essay a few times after the completion. Everyone makes typos and mistakes by accident, but it is about you to find and fix them before your teacher does. If you need help with an essay editing, try asking a friend or a family member to read and analyze your work. Also, you can order editing services in case your paper needs to be perfectly polished so that you can submit an ideal essay and get an excellent grade.

As these steps are simple to follow, you will not have any problems coping with an essay on time. Try the whole procedure at least once, and you will not have to use any other tips preparing an essay paper during your studies!

How do you calculate solder paste volume?

  1. The theoretical volume of solder paste can be calculated for each board using the Greely Formula and a simple volume calculation.
  2. Specific Gravity of the flux vehicle is generalized to 1.
  3. Solder Paste Specific Gravity = 4.14.
  4. Volume for this aperture can be calculated using the following formula:
  5. Length x Width x Height.

What is transfer efficiency in solder paste?

So the transfer efficient is simply the ratio, usually expressed as a percentage, of the volume of the paste you actually get on the board divided by the actual theoretical volume of the stencil.

What is the composition of solder paste used for reflow soldering process?

The solder paste We use a lead free soldering paste with a composition of 96,5% tin, 3% silver, 0.5% copper available in 100g cans and conforming to RoHS requirements, and containing a flux according to EN ISO 9454:2016, 1231; DIN EN 61190-1-3 / IPC J-STD-004B, REL0.

How do you mix solder paste?

If solder paste has flux separation, mixing with a spatula is the most practical way to remix a full jar of solder paste. A true centrifuge will tend to separate solder paste, forcing alloy to settle to the bottom of a jar and flux rising to the top. Some machines rotate a jar while spinning.

What is solder paste composition?

Lead Free Solder Wire and Solder Paste are manufactured using different composition and ratio. But the most popular and widely used composition and ratio is SAC (Tin Silver Copper) in the Ratio 96.5% Tin + 3.0% Silver and 0.5% Copper.

How many zones are in reflow?

four stages
In the conventional reflow soldering process, there are usually four stages, called “zones”, each having a distinct thermal profile: preheat, thermal soak (often shortened to just soak), reflow, and cooling.

How long does solder paste take to dry?

Syringes require approximately fifteen minutes while jars and cartridges can take up to 45 minutes. DO NOT heat paste with an oven or other environment set above “room temperature.” Dry all packing completely prior to use to prevent water coming in contact with the solder paste.

How do you know if solder paste is bad?

Classic symptoms of expired paste or paste that has changed significantly from its original properties include: Significant Separation of flux and powder, Increased viscosity (leads to difficult dispensing), and in some cases large air bubble formation in the syringe.

What is Type 3 solder paste?

The main particle size range is normally associated with the type. For example, Type 3 solder powder mainly falls within the 25 – 45 µm size range, therefore Type 3 solder paste may be labeled as “Type 3 (25-45 µm).” Below are images of these three sizes of solder powder.

What is Delta in reflow?

Delta-T in reflow generally means 2 things – difference in temperature on a product or difference in temperature of your oven. Delta-T on a product is what are your hottest and coolest areas on the board. Larger parts toward the middle of the board with higher mass heat slower than smaller parts on the edges.

At what temp does solder reflow?

The typical reflow temperature range for Pb-Free (Sn/Ag) solder is 240-250°C with 40-80 seconds over 220°C. It should be noted that the recommended Sn/Pb reflow temperature range are less critical, and that minor deviations in temperature of equipment and components generally do not create soldering problems.

What happens if you reflow solder paste?

It is likely that some of the solder paste will be smeared when the component is nudged into place, but most likely the reflow will still be successful because the molten solder will migrate to the pads and can actually float the part into position. Again, each of the legs must be mostly over the correct pad.

How does a solder reflow oven work?

Using a combination of radiated heat and heat convection, the solder reflow oven delivers a carefully regulated flow of consistent heat to the PCB. This process completes the assembly of the board by melting the solder to form good solid solder joints between the components and the board.

How to reduce the volume of solder paste that is printed?

It is common practice to reduce the stencil apertures by 10% area to as much as 50% area as compared to the copper pads. This significantly reduces the volume of solder paste that is printed.

Can reflow soldering technology be used as a primary SMT soldering material?

However, when reflow soldering is used as the most important SMT component-level and board-level interconnect method, it is also required to further improve solderability. In fact, whether the reflow soldering technology can withstand this challenge will determine whether the solder paste can be used as the primary SMT soldering material.