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[4]Rigid Flex PCB Design Guidelines

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   [5]December 13, 2020
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    Early in the rigid flex PCB design process, it's essential to give
   ample consideration to how choices made in the board design will result
   in reduced costs while maintaining reliability. Here we'll lay out the
   general design principles that should guide a designer of rigid flex
   PCB's. What is a Rigid Flex Board? A rigid flex board is a hybrid of
   hardboard and flexible circuits. The manufacturing process resembles
   that of a traditional hardboard circuit, but some of the layers are
   flexible circuitry that run all the way through the hardboards. The
   board fabricator will then add plated through holes to connect layers
   of rigid circuit to regions of flexible circuit. These configurations
   create a rigid flex PCB that can be assembled similarly to hardboards,
   but also fold to fit into a product with space constraints. They are
   also suitable for continuously flexing applications - also known as
   dynamic flex. Well designed, a rigid flex board can withstand hundreds
   of thousands of flex cycle
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[8]Why Rigid Flex PCBs?

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   [9]November 22, 2020
     What is a Rigid Flex PCB? A rigid flex printed circuit boards (PCBs)
   is a hybrid circuit board design that integrates elements from both
   hardboard and flexible circuits. Rigid flex PCBs are rigid at some
   points on the board and flexible at others. Because of this, rigid flex
   circuits can be folded or continuously flexed while maintaining the
   shape of areas that need extra support. The circuits are typically
   multi-layered and are comprised of flexible circuit substrates joined
   with rigid boards. The flexible layers are buried internally and
   completely penetrate the rigid sections of the PCB. One of the key
   benefits of a rigid flex PCB is its slim profile. The standard
   dielectric in flexible circuits is .001 - .002", making it a great
   choice for ultra thin--and ultra light--packaging needs. Adhesiveless
   laminates, HDI, and thin copper layers make it ideal for fine line
   technology, giving you the smallest, thinnest, and lightest solution
   for your circuit designs. Rigid Flex Types Rigid f
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[12]FastPrint Circuit Board Co., Ltd. - pcb factroy

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   [13]November 07, 2020
   FastPrint Circuit Board Co., Ltd. Founded in 1999 and headquartered in
   Shenzhen, Fastprint was listed on Shenzhen Stock Exchange. Three
   manufacturing campuses were built in Guangzhou, Yixing of Jiangsu
   Province and the UK respectively. Five branch offices were opened in
   Beijing, Shanghai, Wuhan, Chengdu andXi'an. Besides, there are two
   subsidiaries in HK and USA, dozens of customer service centers at home
   and abroad. That is to say, Fastprint shaped the international network
   of marketing and technique, offering more than 4,000 customers from the
   globe the good quality service. Fastprint's future goal is to build the
   biggest quick-turn manufacturing platform of prototype, various types
   and low volume PCBs in the world; to offer advanced manufacturing of IC
   Substrate and the assorted technical service; to build the open
   technical service platform and organize experienced specialists groups,
   forming the comprehensive capability of universal core technique in
   E-hardware design; to offer pe
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[16]Q&D Circuits Co., Ltd.-pcb manufacturing

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   [17]November 07, 2020
    Q&D was founded in 2004 with a registered capital of 100 million yuan
   and is headquartered in Bao'an District, Shenzhen. Q&D Circuits
   specializes in the production and sales of high-end PCB and PCBA
   related products. It is a well-known reliable provider of "highly
   difficult, high-quality, High-mix, and quick delivery" circuit boards
   in the industry. Q&D Circuits has two locations in Shenzhen and
   Ganzhou. Large production base, with a total plant area of more than
   50,000 square meters and a total of more than 1,200 employees, with an
   annual output of more than 800,000 square meters of various types of
   circuit boards and more than 150,000 models. Qiangda's circuit business
   spreads all over the world, with subsidiaries in Hong Kong and the
   United States, and offices in Beijing, Xi'an, Wuhan, Chengdu, Sichuan,
   Shanghai, Nanjing, Dalian, Hangzhou, etc.   Q&D Circuits has strong
   product research and development capabilities, and its products cover
   vari
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[20]Aoshikang Technology Company

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   [21]November 07, 2020
    Aoshikang Technology Company with over 10 years of steady development
   focus on the idea of "connect to people, step to future", successfully
   issued A-Share (stock code: 002913) in Shenzhen Stock Exchange on 1st
   December, 2017. ASK became a shareholding enterprise with three
   business entities known as Aoshikang Technology Co. Ltd., Aoshikang
   Precision Circuit (Huizhou) Co. Ltd., and Aoshikang Technology (Hong
   Kong) Co. Ltd.. With our management concept of "centralize management,
   pro-active innovation" continually maintain leadership in the industry
   and attracted talent globally. The advantages make ASK become one of
   trustworthy PCB partner for electronic industry, ASK product widely
   used in data storage, communication networking, automotive, industrial
   control, energy, consumer and etc. with worldwide coverage of Asia,
   Europe, Americas, gained favor of top 500 enterprises Lenovo, ASUS,
   Foxcom, MOBIS, Samsung and etc.. ASK had invested of over RMB 2 billion
   over the years with current
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[24]What is ENIG Plating?

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   [25]October 30, 2020
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     ENIG (Electroless Nickel Immersion Gold)   is a surface plating that
   is applied over the copper pads on a Printed Circuit Board to protect
   them from corrosion and other abnormalities. Initially, the copper pad
   is covered by a   Nickel (Ni)   layer followed by a thin immersion
   Gold (Au)   layer. ENIG provides good oxidation resistance, excellent
   surface planarity and allows for easy soldering which results in
   excellent electrical performance of the PCB board. ENIG is RoHS
   compliant is therefore one of the most used PCB surface finishes even
   though it is more complex and expensive when compared to other PCB
   plating process like  HASL . ENIG is a two-layer metallic coating -
   Nickle  is the barrier to the copper pad and is also the materials to
   which the components are soldered.  Gold  on the other hand protects
   the Nickle during storage and also provides low contact resistance.
   Typical Nickle thickness varies from  4 - 7 Ám and Gold thickness
   varies from 0.05 - 0 23 Ám.  ENIG require
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[28]PCB should use FR4 material if selected.

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   [29]October 11, 2020
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    A Guide to FR4: When Can You Use It and When Can You Not Most
   electrical engineers and individuals involved with printed circuit
   boards are familiar with the material FR4. FR4 is the backbone material
   upon which most rigid circuit boards are built. However, many are
   unaware of what FR4 is, let alone why it is the most popular PCB base.
   Read on to learn more about FR4 printed circuit boards, such as what
   they are, why they are so popular and how FR4 PCB specifications
   compare to other options within the industry. What Is FR4 Material?
   FR4, also written as FR-4, is both a name and a rating. The name is
   applied to the fiberglass-reinforced epoxy-laminated sheets used in
   printed circuit board manufacturing. However, the name also functions
   as a grade used to rate epoxy laminate sheets. The designation
   essentially indicates the base quality of a laminate sheet, meaning a
   variety of sheet materials and designs fall under the FR4 rating. The
   "FR" in the name stands for flame retardant, whil
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[32]Wave Soldering vs. Reflow Soldering

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   [33]October 11, 2020
    Soldering is a huge part of the printed circuit board design process.
   The only reliable way to get your circuits to stick to your board and
   stay there is by soldering them on. Without soldering, there are no
   printed circuit boards. But not all types of soldering are created
   equal, and it can be important to differentiate between the different
   types of PCBs. There are two main types of soldering for PCBs: wave
   soldering and reflow soldering. What is the difference between the two,
   and how do you know which type of soldering to use in which
   circumstances? What Is Wave Soldering? Wave soldering is a bulk
   soldering process that enables one to manufacture many circuit boards
   in a very short amount of time. It works by passing each circuit board
   over a pan of molten solder. A pump in the pan creates a "wave" of
   solder that washes over the board, soldering the components to the
   board. The PCB then receives a water spray or air blowing to safely
   cool it and fix the parts in place. Proper temp
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[36]What is a Rigid Flex PCBs?

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   [37]October 10, 2020
   Image
   A rigid flex printed circuit board (PCB) is a hybrid circuit board
   design that integrates elements from both hardboard and flexible
   circuits. Rigid flex PCBs are rigid at some points on the board and
   flexible at others. Because of this, rigid flex circuits can be folded
   or continuously flexed while maintaining the shape of areas that need
   extra support. The circuits are typically multi-layered and are
   comprised of flexible circuit substrates joined with rigid boards. The
   flexible layers are buried internally and completely penetrate the
   rigid sections of the PCB. One of the key benefits of a rigid flex PCB
   is its slim profile. The standard dielectric in flexible circuits is
   .001 - .002", making it a great choice for ultra thin--and ultra
   light--packaging needs. Adhesiveless laminates, HDI, and thin copper
   layers make it ideal for fine line technology, giving you the smallest,
   thinnest, and lightest solution for your circuit designs. Rigid Flex
   Types Rigid flex PCBs support two primary ap
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[40]RF PCB - Radio Frequency Printed Circuit Boards

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   [41]October 10, 2020
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     Radio frequency printed circuit boards ( RF PCBs ) are an exciting,
   fast growing sector of the PCB manufacturing industry. They are also
   incredibly complex with a dizzying range of options. The engineers at
   San Francisco Circuits can assist you with every step of the
   fabrication and assembly process, including material selection and key
   RF PCB manufacturing challenges to be aware of. What is an RF Circuit
   Board? In general terms, the PCB industry considers an RF circuit board
   to be any high frequency PCB that operates above 100MHz. Within the
   radio frequency class, anything above 2GHz is a Microwave PCB. What is
   a Microwave PCB? The main difference between RF circuit boards and
   Microwave PCBs is in the radio frequency in which they operate.
   Microwave PCBs are classified as any RF circuit board operating above
   2GHz. RF circuit boards and Microwave PCBs are used for communication
   signals in any application that requires receiving and transmitting
   radio signals. For example, some common
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[44]PCB Surface Finishes Comparison: HASL LF, OSP, & ENIG

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   [45]October 10, 2020
    A PCB surface finish is a coating between a component and a bare board
   PCB. It is applied for two basic reasons: to ensure solderability, and
   to protect exposed copper circuitry. As there are many types of surface
   finishes, selecting the right one is no easy task, especially as
   surface mounts have become more complex and regulations such as RoHS
   and WEEE have changed industry standards. Criteria Consider the
   following: Lead vs. Lead free* Component Type* Cost * Reworkability
   Productivity Environment HASL and lead-free HASL For decades HASL was
   one of the most popular surface finish choices. Yet, in recent years,
   manufacturers have realized its limitations. While a surface finish may
   be low cost and robust, fundamental changes in the PCB
   industry--namely, the rise complex surface mount technology--have
   exposed its shortcomings. HASL leaves uneven surfaces and is not
   suitable for fine pitch components. Although it does come in lead-free,
   there are other lead-free options which will like
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[48]Rogers PCB fab

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   [49]October 10, 2020
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     Rogers PCB laminate are the raw materials we have chosen to one of
   the best. We have prepared a sufficient conventional Rogers PCB
   laminate stock, that can on time delivery to your Rogers PCB. ROGERS
   4003C and ROGERS 4350B provide a more cost-effective and processable
   choice of high frequency materials than PTFE due to their excellent low
   dielectric loss characteristics, and are widely used in cellular base
   station antennas and power amplifiers, microwave point-to-point
   connectivity (P2P), automotive radar and sensors, radio frequency
   identification (RFID), high frequency head (LNB) of direct broadcast
   satellites, and other fields. Besides, the thermal expansion
   coefficient of X and Y axis is similar to the copper, and the expansion
   coefficient of Z axis is much lower than FR4 (46ppm/oC), and has a high
   Tg value (>280oC), which guarantees the good dimensional stability and
   high reliability of the whole product in the PCB process and assemble,
   and it will bring more benefits to th
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[52]IT-8338G Data sheet

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   [53]September 26, 2020
   IT-8338G IT-8338G is an advanced ultra-low loss & high Tg (185░ C by
   TMA) material for demanding Radio frequency applications. The material
   has a Dielectric constant of 3.38 and is designed for the base
   stations, Antennas, LNBs for Direct broadcast systems and other RF
   applications. The product offers better dissipation factor and
   insertion loss than fiber reinforced Hydrocarbon materials. The product
   can be paired with a full prepreg offering to build high reliability
   multilayer boards or with other ITEQ materials for Hybrid
   constructions. Applications Next Generation Halogen free product for
   Base Stations, Power amplifiers LNBs for Direct Broadcast systems
   Antenna applications Dipole antennas Key Features Very low loss ~0.0023
   at 10 GHz. Excellent dimensional stability Very stable DK/Df with
   Temperature Ability to use very low profile Copper for reduced
   insertion loss Highly suitable for Hybrids, Ability to make high layer
   count boards Full prepreg offering, Compatible with modif
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[56]IT-8350G Data sheet

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   [57]September 26, 2020
   IT-8350G IT-8350G is an advanced ultra-low loss & high Tg (185░ C by
   TMA) material for demanding Radio frequency applications. The material
   has a Dielectric constant of 3.5 and is designed for the emerging 4.5 G
   LTE and 5G applications requiring halogen free materials with stringent
   thermal stability with temperature and frequency requirements. The
   product is also designed for long range, short range and medium range
   Radars used for Autonomous driving or advanced driver assist systems
   operating in the 24 GHz range. The product offers better dissipation
   factor and insertion loss than fiber reinforced Hydrocarbon materials.
   The product can be paired with a full prepreg offering to build high
   reliability multilayer boards or with other ITEQ materials for Hybrid
   constructions. Applications Next Generation Halogen free product for 4
   G LTE Base Stations, Power amplifiers 4.5G LTE Base stations, Antennas
   and PAs 24 GHz Automotive radar applications 77 GHz. SRR and MRR
   systems 5 G Base St
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[60]IT-88GMW-3.0 Data sheet

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   [61]September 26, 2020
   IT-88GMW-3.0 IT-88GMW-3.0 is an advanced ultra-low loss & high Tg (185░
   C by TMA) material for demanding Radio frequency applications. The
   material is designed for long range, short range and medium range
   Radars used for Autonomous driving or Advanced driver assist systems
   operating in the 76-81 GHz. frequency range. The product offers better
   dissipation factor and insertion loss than fiber reinforced PTFE
   products. Its higher elastic modulus helps reduce mismatch in hybrid
   applications. The thermal conductivity is higher than PTFE based
   systems and therefore the product is also suitable for demanding 5G
   Base stations, power amplifiers and antenna applications which are
   expected to operate in the mm wave range of frequencies and also
   require high power handling capability. The product can be paired with
   a full prepreg offering to build high reliability multilayer boards.
   The dielectric properties are very stable with temperature and
   therefore very suitable for thermal cycling requi
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   4. https://www.pcbsky.com.cn/2020/12/rigid-flex-pcb-design-guidelines.html
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   6. https://www.pcbsky.com.cn/2020/12/rigid-flex-pcb-design-guidelines.html#comments
   7. https://www.pcbsky.com.cn/2020/12/rigid-flex-pcb-design-guidelines.html
   8. https://www.pcbsky.com.cn/2020/11/why-rigid-flex-pcbs.html
   9. https://www.pcbsky.com.cn/2020/11/why-rigid-flex-pcbs.html
  10. https://www.pcbsky.com.cn/2020/11/why-rigid-flex-pcbs.html#comments
  11. https://www.pcbsky.com.cn/2020/11/why-rigid-flex-pcbs.html
  12. https://www.pcbsky.com.cn/2020/11/fastprint-circuit-board-co-ltd-pcb.html
  13. https://www.pcbsky.com.cn/2020/11/fastprint-circuit-board-co-ltd-pcb.html
  14. https://www.pcbsky.com.cn/2020/11/fastprint-circuit-board-co-ltd-pcb.html#comments
  15. https://www.pcbsky.com.cn/2020/11/fastprint-circuit-board-co-ltd-pcb.html
  16. https://www.pcbsky.com.cn/2020/11/q-circuits-co-ltd-pcb-manufacturing.html
  17. https://www.pcbsky.com.cn/2020/11/q-circuits-co-ltd-pcb-manufacturing.html
  18. https://www.pcbsky.com.cn/2020/11/q-circuits-co-ltd-pcb-manufacturing.html#comments
  19. https://www.pcbsky.com.cn/2020/11/q-circuits-co-ltd-pcb-manufacturing.html
  20. https://www.pcbsky.com.cn/2020/11/aoshikang-technology-company.html
  21. https://www.pcbsky.com.cn/2020/11/aoshikang-technology-company.html
  22. https://www.pcbsky.com.cn/2020/11/aoshikang-technology-company.html#comments
  23. https://www.pcbsky.com.cn/2020/11/aoshikang-technology-company.html
  24. https://www.pcbsky.com.cn/2020/10/what-is-enig-plating.html
  25. https://www.pcbsky.com.cn/2020/10/what-is-enig-plating.html
  26. https://www.pcbsky.com.cn/2020/10/what-is-enig-plating.html#comments
  27. https://www.pcbsky.com.cn/2020/10/what-is-enig-plating.html
  28. https://www.pcbsky.com.cn/2020/10/pcb-should-use-fr4-material-if-selected.html
  29. https://www.pcbsky.com.cn/2020/10/pcb-should-use-fr4-material-if-selected.html
  30. https://www.pcbsky.com.cn/2020/10/pcb-should-use-fr4-material-if-selected.html#comments
  31. https://www.pcbsky.com.cn/2020/10/pcb-should-use-fr4-material-if-selected.html
  32. https://www.pcbsky.com.cn/2020/10/wave-soldering-vs-reflow-soldering.html
  33. https://www.pcbsky.com.cn/2020/10/wave-soldering-vs-reflow-soldering.html
  34. https://www.pcbsky.com.cn/2020/10/wave-soldering-vs-reflow-soldering.html#comments
  35. https://www.pcbsky.com.cn/2020/10/wave-soldering-vs-reflow-soldering.html
  36. https://www.pcbsky.com.cn/2020/10/what-is-rigid-flex-pcbs.html
  37. https://www.pcbsky.com.cn/2020/10/what-is-rigid-flex-pcbs.html
  38. https://www.pcbsky.com.cn/2020/10/what-is-rigid-flex-pcbs.html#comments
  39. https://www.pcbsky.com.cn/2020/10/what-is-rigid-flex-pcbs.html
  40. https://www.pcbsky.com.cn/2020/10/rf-pcb-radio-frequency-printed-circuit.html
  41. https://www.pcbsky.com.cn/2020/10/rf-pcb-radio-frequency-printed-circuit.html
  42. https://www.pcbsky.com.cn/2020/10/rf-pcb-radio-frequency-printed-circuit.html#comments
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  44. https://www.pcbsky.com.cn/2020/10/pcb-surface-finishes-comparison-hasl-lf.html
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