|
 |
 |
|
|
 |
|
|
| |
|
|
|
|
| |
|
Ordering two 3.5" x 4.5" boards using the
4 Layer - Standard Service costs only $160. |
|
|
| |
|
|
|
|
| |
|
Increasing the quantity to four boards adds just $30, totaling $190. |
|
|
| |
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
| |
Manufacturing Specs |
|
|
|
|
| |
> ExpressPCB offers a choice of several manufacturing options, including two-layer and four-layer circuit boards. The specifications for each of these choices are listed below. |
|
|
|
|
|
| |
|
|
|
|
|
| |
| |
|
| 4 Layer - Standard Service |
|
> Our 4 Layer - Standard Service offers a low cost choice for having 4-layer boards made in small quantities. These boards are very high quality but do not include a silkscreen or solder masks. By eliminating these extras, we can offer great multi-layer boards without a large setup fee.
Multilayer boards have many advantages over double-sided boards. They can be designed more compactly, they greatly improve noise immunity and are much easier to lay out. |
|
|
|
| |
|
|
| Description |
|
| > 4 Layer - Standard Service boards have top and bottom copper layers with a tin/lead solder plating. Sandwiched inside are Ground and Power planes. Through-hole pads can be connected to, or isolated from, the planes. These boards do not include soldermasks or silkscreen layers, which are primarily cosmetic. Electrically, the boards are first rate with bright shiny traces and pads. The opaque inner layers give the boards a charcoal gray appearance. |
|
|
|
|
|
|
| |
|
|
| Pricing |
|
| > |
The cost of your order depends mainly on the size and quantity of the boards. Our pricing formula is:
$130 + ($0.87 * NumberOfBoards * BoardAreaInSquareInches) + ($1.25 * NumberOfBoards) + Shipping. |
|
| |
|
|
| > |
Boards with more than 25 holes per square inch require an extra fee of $0.005 for each additional hole. |
|
| |
|
|
| > |
For pricing purposes, the minimum board area is 4 square inches. |
|
| |
|
|
| > |
The typical cost for shipping 2 boards within the U.S. by Second Day Air is $9.85. |
|
| |
|
|
| > |
Orders submitted Monday through Friday by 2:00pm ET are shipped in 3 business days. |
|
| |
|
|
| > |
7.75% state sales tax is added to orders shipped to California. |
|
| |
|
|
| > |
Paying for your boards is easy by Mastercard, Visa or American Express. |
|
|
|
 |
|
|
|
| |
|
|
| Manufacturing Specs |
|
| > |
Boards are manufactured with 4 copper layers and plated-through holes. |
|
| |
|
|
| > |
Our laminate is FR-4 with an overall thickness of 0.062". The two inner layers have a copper weight of 1 ounce. The outer copper layers have a finished copper weight of ~1.25 ounce. |
|
| |
|
|
| > |
The final finish of the outer layers is tin-lead reflow. (Lead-
free is not available with our 4 Layer - Standard service) |
 |
|
|
| |
|
|
| > |
The maximum board size we manufacture is 12 x 14 inches.
|
|
| |
|
|
| > |
The minimum board dimension in height or width is 0.35 inches, however the total board area must be greater than 0.4 square-inches. (i.e. smallest square board we can make is 0.64 x 0.64 inches) |
|
| |
|
|
| > |
Etching resolution is: 0.006" minimum trace width, 0.006" minimum space width. |
|
| |
|
|
| > |
Board perimeters are cut to shape using a 0.093" router bit. Slots in the perimeter must be 0.100" or wider. Narrower slots will not be milled correctly. Routing slots or holes in the interior of the board are not offered.
|
|
| |
|
|
| > |
The perimeter of a board cannot include long slots as they can cause manufacturing problems. We regret that we cannot be responsible for any defects that are a result of routing multiple circuits on a single board. |
|
| |
|
|
| > |
The edges of the board are cut with an accuracy of +/- 0.015". A minimum of 0.020" blank space is recommended between the perimeter and all features on the board. Traces placed closer than 0.015" to the board's edge may be routed off. |
|
| |
|
|
| > |
Twenty-four hole sizes are available: 0.008", 0.014", 0.020", 0.025", 0.029", 0.033", 0.035", 0.040", 0.043", 0.046", 0.052", 0.061", 0.067", 0.079", 0.088", 0.093", 0.100", 0.110", 0.125", 0.141", 0.150", 0.167", 0.192", 0.251". These sizes are the finished hole diameters after plating. The 0.008" and 0.014" holes may be filled with solder and can only be used as via. The tolerance for the 0.020" hole is +0.003 / -0.005. The tolerance for the other hole sizes are +/- 0.004". Hole sizes other than those list are not offered.
|
|
| |
|
|
| > |
A minimum of 0.021" space must remain between adjacent holes. For example, the center-to-center distance between two pads with 0.020" holes must be 0.041" or greater. |
|
| |
|
|
| > |
The dielectric spacing between the top layer and the "Ground" inner layer is 0.012" with a dielectric constant of 4.6 +/-0.2. The dielectric spacing between the bottom layer and the "Power" inner layer is 0.012" with a dielectric constant of 4.6 +/-0.2. The dielectric spacing between the "Power" and "Ground" inner layers is 0.028" with a dielectric constant of 4.7 +/-0.2. |
|
| |
|
|
| > |
The two inner layers are solid copper planes. Through-hole pads can either be connected to or isolated from these copper planes. The planes are inset 0.025" from each edge of the board. |
|
| |
|
|
| > |
We do not recommend that users cut apart 4 layer boards because this can result in shorts between the inner layers.
|
|
| |
|
|
| > |
The maximum operating temperature is 125 degrees C. |
|
|
|
Pricing and manufacturing specifications are subject to change without
notice. Please check these pages for current information. |
|
|
|
| |
|
|
|
|
| |
|
|
|
|
|
