Tags |
|
|
Links |
|
|
Other Added - Basics of Manufacturing Printed Circuit Boards
Congratulations! You’ve decided to publish an ezine. But where do you begin? As with anything, at the beginning.Before you write your first word there are some decisions you need to make. Ask yourself these 5 questions:1.What is the topic of your ezine?This may seem like a silly question if you are far enough along in the process that you know you want to publish an ezine, but you would be surprised how many ezines are out there that seem to have no solid topic. They seem to be there for the sole purpose of taking up space in their subscriber’s email inbox, of which there are few.Don’t let this happen to you. It takes far too much work to publish an ezine to not have a specific topic of interest to the masses. And, yes, no matter what topic you decide to dedicate your ezine to, there are potentially hundreds or thousands of readers waiting to subscribe, if your topic is sp
In a typical four layer board design, the internal layers are often used to provide power and ground connections, such as a +5V plane layer and a Ground plane layer as the two internal layers, with all other circuit and component connections made on the top and bottom layers of the board. Very complex board designs may have a large number of layers to make the various connections for different voltage levels, ground conne
Introduction: Genetic or Learned?A good majority of the literature published on entrepreneurship concludes that entrepreneurs are either born, or conditioned at a very early age in life. If that is the case, and we all have the innate ability to do what it takes to be successful in creating a novel business for a special, untapped market, we would all be doing it. It makes more sense working hard for oneself and reaping all of the rewards than working hard for someone else while they reap most of the rewards. Would it not be better to think that the ability to create a new business success is within us all? And that all we need are the right tools, adequate education, a conducive environment and the mentors to show us how to bring it all together in order for us to succeed. Without the ability to teach entrepreneurial skills that entail using creativity mixed with intrinsic mo
The boards are also used to electrically connect the required leads for each component using conductive copper traces. The component pads and connection traces are etched from copper sheets laminated onto a non-conductive substrate. Printed circuit boards are designed as single sided with copper pads and traces on one side of the board only, double sided with copper pads and traces on the top and bottom sides of the board, or multilayer designs with copper pads and traces on top and bottom of board with a variable number of internal copper layers with traces and connections.
Single or double sided boards consist of a core dielectric material, such as FR-4 epoxy fiberglass, with copper plating on one or both sides. This copper plating is etched away to form the actual copper pads and connection traces on the board surfaces as part of the board manufacturing process. A multilayer board consists of a number of layers of dielectric material that has been impregnated with adhesives, and these layers are used to separate the layers of copper plating. All of these layers are aligned and then bonded into a single board structure under heat and pressure. Multilayer boards with 48 or more layers can be produced with today's technologies.
In a typical four layer board design, the internal layers are often used to provide power and ground connections, such as a +5V plane layer and a Ground plane layer as the two internal layers, with all other circuit and component connections made on the top and bottom layers of the board. Very complex board designs may have a large number of layers to make the various connections for different voltage levels, ground connec
While identity theft is nothing new, the Web has opened up whole new world of opportunity for identity thieves.According to the FBI, identity theft is the top online fraud. The U.S. Federal Trade Commission says that identity theft is it's number one source of consumer complaints - 42 percent of all complaints, in 2001.The thief will use your personal information to open credit card accounts, cell phone accounts, open bank accounts in your name and write bad checks-leaving the victim with the bills and ruined credit ratings. Identity thieves may pose as representatives of banks, Internet service providers and even government agencies to get you to reveal your Social Security number, mother's maiden name, financial account numbers and identifying information.In a recent article (http://www.msnbc.com/news/830411.asp), MSNBC reported the case of a man who fell victim to a fraudulent
The boards are also used to electrically connect the required leads for each component using conductive copper traces. The component pads and connection traces are etched from copper sheets laminated onto a non-conductive substrate. Printed circuit boards are designed as single sided with copper pads and traces on one side of the board only, double sided with copper pads and traces on the top and bottom sides of the board, or multilayer designs with copper pads and traces on top and bottom of board with a variable number of internal copper layers with traces and connections.
Single or double sided boards consist of a core dielectric material, such as FR-4 epoxy fiberglass, with copper plating on one or both sides. This copper plating is etched away to form the actual copper pads and connection traces on the board surfaces as part of the board manufacturing process. A multilayer board consists of a number of layers of dielectric material that has been impregnated with adhesives, and these layers are used to separate the layers of copper plating. All of these layers are aligned and then bonded into a single board structure under heat and pressure. Multilayer boards with 48 or more layers can be produced with today's technologies.
In a typical four layer board design, the internal layers are often used to provide power and ground connections, such as a +5V plane layer and a Ground plane layer as the two internal layers, with all other circuit and component connections made on the top and bottom layers of the board. Very complex board designs may have a large number of layers to make the various connections for different voltage levels, ground conne
What is a Set Designer?A Set Designer is someone in charge of creating an environment for a production to be staged in. “An environment can be composed of sound, light, clothing, performance, structure and space.” (2005, ScenographySchool SubjectsSet Design requires mainly subjects to do with the arts. Art is an essential starting point. Drama, as knowledge of how actors work and utilise the stage is essential. Construction subjects such as wood, plastic and metalwork should also be considered. Study of society and the environment and well as history helps to bolster the knowledge base required to do natural/historic set designs.Training RequiredIn the uber competitive world of set design, to gain employment you will need at least a MFA [Master of Fine Arts] style official certification in Set Design. You can gain this degree t
Single or double sided boards consist of a core dielectric material, such as FR-4 epoxy fiberglass, with copper plating on one or both sides. This copper plating is etched away to form the actual copper pads and connection traces on the board surfaces as part of the board manufacturing process. A multilayer board consists of a number of layers of dielectric material that has been impregnated with adhesives, and these layers are used to separate the layers of copper plating. All of these layers are aligned and then bonded into a single board structure under heat and pressure. Multilayer boards with 48 or more layers can be produced with today's technologies.
In a typical four layer board design, the internal layers are often used to provide power and ground connections, such as a +5V plane layer and a Ground plane layer as the two internal layers, with all other circuit and component connections made on the top and bottom layers of the board. Very complex board designs may have a large number of layers to make the various connections for different voltage levels, ground conne
There is an old adage in the funding community: “Investing $1,000,000 to fail is expensive, investing $5,000,000 to succeed is cheap. Investors will respond to funding needs based on real world assumptions. They will be very cautious when assessing a venture’s real funding requirements.Think of investment capital as fertilizer. If a farmer applies too little he harvests a poor crop or worse. Too much fertilizer and the harvest will likewise be disappointing. Experienced, successful farmers know their fields, their climate, crop planting patterns and their equipment. They will apply every pound of fertilizer needed to maximize their harvest. Investors handle their capital in exactly the same way.I review many business plan submissions each year. It is amazing how many entrepreneurs can not identify, quantify or justify the investment requirements they describe in their business plans. Th
In a typical four layer board design, the internal layers are often used to provide power and ground connections, such as a +5V plane layer and a Ground plane layer as the two internal layers, with all other circuit and component connections made on the top and bottom layers of the board. Very complex board designs may have a large number of layers to make the various connections for different voltage levels, ground conne
The advantages of exporting are clear. Increased exports greatly benefit a country’s economy, because they create jobs, stimulate economic growth, bring in tax revenues, and enable domestic industries to compete in international markets. Firms that export can grow faster, because they can utilize idle capacity, reduce dependence on domestic markets, increase product lifecycles, and simply make more money.Previously, the vast U.S. domestic market usually provided American companies ample opportunities to grow and remain profitable. Now, domestic market saturation and increased international competition are taking their toll, leaving U.S. companies with tighter margins and little room for growth. This forces many businesses to look to international markets for new opportunities.The U.S. government has recognized the significance of increased exports for the overall health of our econo
In a typical four layer board design, the internal layers are often used to provide power and ground connections, such as a +5V plane layer and a Ground plane layer as the two internal layers, with all other circuit and component connections made on the top and bottom layers of the board. Very complex board designs may have a large number of layers to make the various connections for different voltage levels, ground connections, or for connecting the many leads on ball grid array devices and other large integrated circuit package formats.
There are usually two types of material used to construct a multilayer board. Pre-preg material is thin layers of fiberglass pre-impregnated with an adhesive, and is in sheet form, usually about .002 inches thick. Core material is similar to a very thin double sided board in that it has a dielectric material, such as epoxy fiberglass, with a copper layer deposited on each side, usually .030 thickness dielectric material with 1 ounce copper layer on each side. In a multilayer board design, there are two methods used to build up the desired number of layers. The core stack-up method, which is an older technology, uses a center layer of pre-preg material with a layer of core material above and another layer of core material below. This combination of one pre-preg layer and two core layers would make a 4 layer board.
The film stack-up method, a newer technology, would have core material as the center layer followed by layers of pre-preg and copper material built up above and below to form the final number of layers required by the board design, sort of like Dagwood building a sandwich. This method allows the manufacturer flexibility in how the board layer thicknesses are combined to meet the finished product thickness requirements by varying the number of sheets of pre-preg in each layer. Once the material layers are completed, the entire stack is subjected to heat and pressure that causes the adhesive in the pre-preg to bond the core and pre-preg layers together into a single entity.
The process of manufacturing printed circuit boards follows the steps below for most applications:
Basic Steps for Manufacturing Printed Circuit Boards:
1. Setup - the process of determining materials, processe
HTTP = HTML link (for blogs, profiles,phorums):
<a href="http://www.otheradded.com/article/20070/otheradded-Basics-of-Manufacturing-Printed-Circuit-Boards.html">Basics of Manufacturing Printed Circuit Boards</a>
BB link (for phorums):
[url=http://www.otheradded.com/article/20070/otheradded-Basics-of-Manufacturing-Printed-Circuit-Boards.html]Basics of Manufacturing Printed Circuit Boards[/url]
Related Articles:
Extranets: Better than eMail for Group Collaboration
Going Public: How Long Does it Take?
Breakthrough for the Business Person: How to Overcome Career Disappointment and Create Your World
Bookmark it:
|