During the late 1990's the term "Black Pad" was introduced to the industry and was described as a specific kind of nickel corrosion to the ENIG deposit. This was on surface mount pads as they started taking over the designs of PCB's. This type of corrosion affected the solder joint inte...
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Boards that are exposed to the classic multiple soldering processes (double sided reflow followed by wave soldering) have seen this type of defect. It occurs only on the contact side of the thru-hole during the wave soldering process. It appears similar to black pad as the residue is b...
By feeling inspired by this information and actually being delighted and fully motivated to have a black and gray kitchen, some tips tend to help you right now and make your kitchen totally up to date. With this, check out how to establish black and gray in your kitchen, taking precise ac...
So the Royals, who were supposed to go to Baltimore to open a series with the Orioles the next day, took a detour and headed for New York. “Our closer, Dan Quisenberry, was going to pitch the ninth when the game resumed,” Black said. “Quis was a nervous wreck on the plane becau...
There are two kinds of melanin found in the hair: eumelanin (the most common and responsible for hair shades from brown to black) and phaeomelanin (responsible for yellowish-blond, ginger and red colors). Absence of pigment produces white/gray hair. Before any permanent color can be deposite...
In orderto relieve this congestion, Tarugu recommends that folks sleep on a few pillows with the head elevated to maintain a position where your head is above the heart. He says, “That will reduce the pooling of blood flow in the nose. By contrast, lying flat allows the mucus to build...
I tried to say something, but no words came. I didn’t yet know how to describe what I felt. Surely the word was “wonder.” What New York Could Look Like in 2020 Manhattan is in the midst of an unprecedented tall building boom that’s radically changing its skyline.Explore the inter...
Control variables describe exogenous influences on the dependent variable. Demographics, such as gender or family background or other control variables like previous work experience, are often used to “control” the possible effect on the dependent variable. Our research questionnaire collected data on...
Southern Africa is an exceptionally diverse region with an ancient geologic and climatic history. Its mountains are located in the Southern Hemisphere mid-latitudes at a tropical–temperate interface, offering a rare opportunity to contextualise and fram