在上一篇文章中，您听说过使用夹层连接器来增强系统级别的灵活性并为IO配置提供多种选择。这种方法可以有效地增加产品的可用市场规模，并大大提高基础板的使用寿命。夹层解决方案也可以解决许多其他系统级问题。
Reduce system cost by isolating complexity
低技术主板的示例，其高科技“复杂性”夹层卡。插图由切肉刀布林克霍夫提供。
印刷电路板是系统总成本的重要部分，尤其是在一个将大量功能包装到一个PCB上的系统中。示例跨越了许多应用：
• Large FPGAs (Field Programmable Gate Arrays) are the heart of many systems. These chips require many pins to provide the IO, power, and multitude of ground connections needed to support signal integrity needs for high-density interconnection. The more rows in the pin field underneath the device, the more PCB layers are necessary for routing out of the pin field. With a very tight 1 x 1-mm grid, generally only one trace can be routed between vias under the FPGA. The more pins, the more layers are needed.
•这些迹线需要很好，为0.004英寸。为典型的痕量宽度。为了使PCB随着层计数的增加而保持较薄，需要尽可能狭窄。具有精美功能和许多层的板子制造昂贵，随着板的变化，由于产量较低，板变得更加昂贵。
Along come mezzanine boards to save the day
Instead of having a full motherboard that is complex, it is quite possible to have an “island of complexity” in the middle of a lower technology board. The PCB right under the FPGA is commonly 2x the FPGA dimension both ways and can be precisely back drilled for maximum performance. This allows the traces to fan out to an interconnect area that can use conventional mezzanine connectors. The motherboard can then become less complex, having fewer layers, larger vias, and much lower manufacturing cost. This technique is commonly used across a wide range of systems.
这些复杂性的岛屿还可以包括具有盲和掩埋vias的木板或其他不适合大格式主板的特征。
隔离技术
一些设备需要具有特殊技术的董事会才能达到最佳性能。例如，由于对RF板进行了优化，可用于非常精确的阻抗控制，低串扰和最小损失，因此您通常需要使用Teflon PTFE内层。如果该技术可以局限于夹层卡，这将是一个重大的成本好处。纤维收发器是另一种可以从一张容易替换的卡片上受益的技术。
Digital signals coming from the motherboard can be converted to analog signals on this board optimized for RF signals.
As a result, mezzanine boards can also serve as a bridge between the nanometer scale technology used on semiconductors and the 1- x 1-mm scale interconnects used for FPGA to PCB connections and the more robust PCB and connector technology used on plug-in cards or motherboards used in larger systems.
Improving time to market for new chips
How many times have you had to delay development of a next generation system because a new chip is not yet available? Mezzanines can enable developers to bring up and debug the system with existing semiconductors, then quickly drop in the latest and greatest when it becomes available, mitigating risk, improving time-to-market, and creating a much smoother transition between systems shipping today and upgrades for tomorrow.
这种方法还可以使制造商可以使用两个替代供应商开发系统。如果选择了常见的夹层格式，则半导体供应商将根据功能，可用性，价格和质量竞争。成功的补充者将是第一个提供所有四个属性的人。
Improving yields
Some parts have inherently lower yields. By placing these parts on a mezzanine, system fabricators and integrators can quickly make a last minute repair, if necessary, by just replacing the mezzanine cards, improving on-time shipments, quality and yields. The fiber example above can fall into this category.
Conclusion
夹层连接器已经成为连接器行业的工作马已有几十年了，增加了许多系统级的灵活性以及OEM快速，轻松自定义其为客户提供产品的能力。夹层还通过分区基础委员会的复杂性或特殊技术组件来帮助控制成本。正确使用后，夹层可以降低您的成本和风险，同时提高对客户的响应能力。
People seldom think about connectors reducing system cost and improving quality, but as you can see, they certainly do.
The postMezzanine connectors as cost reducers第一次出现在连接器提示。
提交以下：连接器提示，，，，Connectors (electrical) • crimp technologies
