![\"PCB](\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/06\/pcb-layout-e1691117215111.webp\")
<\/p>\nAs mobile devices continue to shrink in size and the number of components increases, the available space on 5G circuit boards is becoming increasingly limited. How to accommodate more functional components within this limited space has become a challenge for manufacturers. Traditional PCB design can no longer meet the space utilization requirements of the new generation of 5G devices.<\/p>\n
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When addressing the challenge of space constraints, an innovative multi-layer sub-board design has emerged as one solution. Dividing the main board into multiple sub-boards with relatively independent functions and stacking them vertically can significantly reduce the main board\u2019s footprint. Core components, such as the processor and baseband, are connected via inserters, which not only saves space but also enhances the overall performance of the circuit board.<\/p>\n
To meet the high-density requirements of 5G circuit boards, most mobile devices will adopt substrate-like panel (SLP) technology. Although SLP boards are high-density interconnect (HDI) boards, their technical specifications are already approaching the level of IC packaging substrates. The minimum line width and spacing have been reduced to 25 \u00b5m\/25 \u00b5m, and in some cases even to 50 \u00b5m, enabling the placement of more functional components within a limited space on the circuit board.<\/p>\n
Impedance analysis is crucial during the initial stages of PCB design. The design must take into account factors such as appropriate copper thickness, impedance-optimized trace widths, dielectric thickness, and solder mask thickness, as well as the need to dynamically adjust the circuit during the design process. High-frequency and high-speed sections require pre-compensation design to ensure circuit stability and performance.<\/p>\n
In the early stages of PCB design, thermal management is one of the factors that must be considered from the outset. During the design process, it is necessary to estimate the power dissipation of the primary heat-generating components and use thermal simulation tools to optimize component placement and PCB layout. A well-designed layout can help address thermal management issues to a certain extent and improve the reliability and stability of the circuit.<\/p>\n
PCB design is a critical step in the entire circuit board manufacturing process. Here are some key considerations for PCB design:<\/p>\n
When selecting PCB materials, it is necessary to strike a balance between meeting design requirements, mass production, and cost. Both electrical and mechanical components must be taken into account, with particular attention paid to the frequency consistency of the dielectric constant and dielectric loss.<\/p>\n
In the design process, efforts should be made to minimize interference from high-frequency electromagnetic fields and prevent crosstalk. A well-planned layout can effectively reduce problems caused by high-frequency interference.<\/p>\n
Impedance matching is key to resolving signal integrity issues. Design considerations must include the signal source architecture, output impedance, and trace characteristics, as well as the characteristics and topology of the load.<\/p>\n
When transmitting differential signals, attention must be paid to the length and spacing of the differential pairs. The length should be as long as possible, while the spacing should be kept consistent and the pairs should remain parallel to maintain differential impedance consistency.<\/p>\n
When there is only one output on a clock signal line, differential routing cannot be used. To use differential routing, there must be at least two outputs.<\/p>\n
Matching resistors are typically added between the differential pairs at the receiving end to improve signal quality.<\/p>\n
The differential pair wires should be kept parallel and connected to ensure consistent differential impedance.<\/p>\n
When wiring, avoid having signal traces cross partitioned areas, minimize the return current paths for power and signals, and keep the crystal oscillator close to the chip.<\/p>\n
Circuit board design in the 5G era faces challenges such as space constraints and high density, but it also gives rise to innovative solutions. Through multilayer sub-board design, the application of SLP technology, and proper impedance analysis and thermal management, we can achieve more powerful and stable circuit board designs within limited space.<\/p>\n
1. What are the main challenges associated with 5G circuit boards?<\/strong> 2. What is Substrate-Like Package (SLP) technology?<\/strong> 3. How can we solve the problem of differential signal transmission?<\/strong> 4. How can we address high-frequency interference in 5G circuit boards?<\/strong> 5. Why is it important to consider heat dissipation in the design process?<\/strong> \u968f\u7740\u79fb\u52a8\u7ec8\u7aef\u5c3a\u5bf8\u7684\u9010\u6e10\u51cf\u5c0f\u548c\u5143\u5668\u4ef6\u6570\u91cf\u7684\u589e\u52a0\uff0c5G\u7535\u8def\u677f\u7684\u5269\u4f59\u7a7a\u95f4\u8d8a\u6765\u8d8a\u6709\u9650\u3002\u5982\u4f55\u5728\u6709\u9650\u7684\u7a7a\u95f4\u5185\u5bb9\u7eb3\u66f4\u591a\u7684\u529f\u80fd […]<\/p>\n","protected":false},"author":1,"featured_media":6055,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"Considerations for PCB Design","description":"What are the key considerations in PCB design? This covers topics ranging from multilayer sub-boards and 3D stacking, carrier-like boards, and impedance analysis to thermal simulation, and explains the selection of high-frequency materials and methods for addressing high-frequency interference."},"_slim_seo_primary_term_category":0,"_slim_seo_primary_term_post_tag":0,"footnotes":""},"categories":[26],"tags":[160],"class_list":["post-1376","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-160"],"_links":{"self":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/1376","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/comments?post=1376"}],"version-history":[{"count":1,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/1376\/revisions"}],"predecessor-version":[{"id":19149,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/1376\/revisions\/19149"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media\/6055"}],"wp:attachment":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media?parent=1376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/categories?post=1376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/tags?post=1376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n5G circuit boards face challenges posed by space constraints and increasing component density.<\/p>\n
\nSLP technology is a high-density interconnect (HDI) board technology suitable for 5G circuit board designs that require high density.<\/p>\n
\nDifferential signal transmission requires maintaining consistent lengths and spacing for the differential pairs, as well as adding matching resistors to improve signal quality.<\/p>\n
\nThe key to avoiding high-frequency interference is to minimize interference from high-frequency electromagnetic fields and maintain a reasonable design layout.<\/p>\n
\nA well-designed heat dissipation system can improve the reliability and stability of a circuit board and ensure that electronic components operate within their normal operating temperature range.<\/p>","protected":false},"excerpt":{"rendered":"