MANUFACTURER DOSSIER
惠州市联达金电子有限公司 · Guangdong
Huizhou Liandajin Electronic Co., Ltd. · 惠州市联达金电子有限公司 publishes FR-4 control boards and modules alongside aluminium, ceramic, PTFE and PTFE/FR-4 hybrid examples. Its factory contact and qualification copies locate the business south of Banzhangling, Longshan Sixth Road, Daya Bay West District, Huizhou, Guangdong.
Its introduction traces the business to 2005. The manufacturer-hosted business-licence copy records the Huizhou legal entity's establishment on 4 November 2009, with unified social credit code 914413006981138669. Keep company-history dates and legal registration distinct when specifying the contracting entity.
The practical shortlist starts with your material, actual stack and acceptance plan. A thin eight-layer automotive board, a thick four-layer control board and a PTFE hybrid need different engineering discussions. Twelve catalogue examples below preserve those differences.
These four examples use FR-4 but differ in thickness, fine-line geometry and surface treatment. The half-hole module needs an edge-plating and solder-joint drawing; the power and industrial boards need copper and thermal or mechanical requirements. Neither is defined by the application name alone.
Release the power-net copper, clearance and temperature-rise criteria with the stack and soldering process. This example does not specify copper weight or a voltage rating.
Dimension the castellated edge, plated half-holes, solderable area and routing tolerances; provide the module panel and assembly drawing. The hole value does not define the finished castellated geometry.
Confirm the 2.0 mm thickness tolerance, connector/mounting interfaces, copper and storage/solderability requirements for the immersion-tin surface.
Request the actual stack and fine-line process review for this 2.0 mm construction; specify test coverage and pad-finish acceptance. Security is its catalogue application, not a security-product approval.
The original pages express line/space in mil; the directory also shows the direct conversion, using 1 mil = 0.0254 mm. Their “minimum hole” fields do not state drill versus finished plated diameter. Those literal values remain visible, but are not treated as confirmed finished-hole filter limits.
Specify the finished hole and tolerance, plating allowance, castellated-edge drawing and inspection locations. OSP, immersion tin and immersion gold are separate finish choices; agree chemistry, thickness where relevant, shelf life and assembly acceptance.
The communications example has six layers at 1.2 mm; the medical example has ten at 1.6 mm. Two distinct automotive pages publish two layers at 1.6 mm and eight at 1.0 mm. These are individual construction references, not a promise to combine the finest line, maximum copper and highest layer count.
Provide the six-layer stack, signal references and any impedance targets. No RF loss or impedance tolerance is stated for this individual communications example.
Specify the device programme, lot traceability, cleanliness and inspection/reliability requirements. A medical application name alone does not establish device approval or a tested medical assembly.
Set the surface-finish chemistry and thermal/cleanliness requirements, then agree automotive documentation and the supplying site. Do not assume this HASL example is lead-free.
Release a stack and warpage/handling limits for the 1.0 mm eight-layer board; confirm finish chemistry and programme-specific documentation. Its layer/thickness values are separate from the two-layer automotive example.
For an automotive or medical programme, connect the construction to a supplying address, material batch, control plan, change-control procedure and agreed reporting. The qualification copies reviewed below have their own entity, scope and dates. An application label does not make a board a qualified device or approve it for your programme.
Liandajin's specialty pages supply useful starting geometry, but they do not identify laminate brands, dielectric grades or thermal performance. Use the original example to open a material-specific review, then settle the properties required by your circuit and assembly.
Ask for the aluminium alloy, dielectric thickness, thermal conductivity, isolation voltage and copper. The aluminium label alone does not define a thermal or electrical-insulation rating.
Request the exact ceramic composition, metallisation process, thermal/mechanical limits and dielectric data. Do not infer alumina, AlN, DBC, frequency range or RF performance from the photograph.
Specify laminate grade, dielectric constant/loss, copper and hole-treatment acceptance at the intended frequency. The page publishes no laminate brand or RF performance.
Provide a layer-by-layer material and bond-ply schedule, pressing cycle, drill/plating acceptance and impedance coupon. Confirm the truncated finish field before quotation; do not assume immersion tin or silver.
Its readable Chinese text states immersion gold, followed by an unfinished second term. The second process has not been guessed. Obtain a written finish specification before comparing quotations. The published 0.8 mm minimum-hole figure is also specific to that hybrid example; it is not replaced by the site's general 0.15 mm figure.
For ceramic, request the actual composition and metallisation process. For aluminium, request the insulating dielectric and thermal data. For PTFE and hybrids, release the individual dielectric layers, bonding materials and electrical test coupon. None of these properties can be established from board colour or appearance.
The quality page publishes separate sample and volume timing references for two-, four- and six-layer boards. The table below transcribes them; the page does not define working versus calendar days, quantity bands, material readiness, engineering approval or transport.
| Layers | Sample | Volume |
|---|---|---|
| 2 | 4–5 days | 10–12 days |
| 4 | 5–6 days | 14–16 days |
| 6 | 7–8 days | 16–18 days |
There is no equivalent published schedule here for the ten-layer medical board or specialty materials. Request a construction- and quantity-specific quotation rather than extrapolating the two-layer sample time.
The introduction's staff and 60,000 m²/month figures use forecast wording; they are not evidence of available production slots today. Obtain an actual schedule rather than treating the profile as a capacity reservation.
The source-labelled equipment gallery shows drilling, AOI, exposure, etching, electrical testing, impedance testing, coating-thickness measurement, ionic-contamination testing and copper-foil peel testing. The four photographs below are corresponding gallery originals; the gallery does not establish current ownership or utilisation through a site audit.
Specify netlist revision, electrical-test coverage and report format, hole and outline tolerances, panel dimensions and inspection sampling. For impedance, agree target, tolerance, coupon geometry, measurement conditions and the report associated with the actual lot; the general ±10% statement is not a test result.
The Q·C·D·S page expresses zero-escape quality goals and a 48-hour countermeasure response. Those are stated policies, not measured defect rates or a guaranteed resolution time. Agree containment, root-cause reporting, replacement and escalation obligations in the order.
For immersion-tin or HASL examples, add solderability, storage and finish chemistry requirements. For fine-line, hybrid or medical constructions, define microsection, cleanliness and reliability evidence appropriate to the use.
The official contact page publishes ldj@liandajin.com and 0752-5369808 for the Huizhou business. It also lists regional marketing contacts. The Shanghai entry has a separate company name, Shanghai Liandajin Circuit Co., Ltd.; do not treat every sales office as the production site.
The public mailbox was read on the official site; control of the mailbox was not tested. Keep the enquiry on PCBVerified using the construction shortlist, and request the exact quoting entity, factory address and scope of any subcontracted process.
The environmental disclosure includes manufacturer-hosted historical approval, acceptance and monitoring files, including 2022 monitoring records. Their presence is not a current environmental-compliance conclusion.
Prepare the Liandajin production brief →The Intertek IATF 16949:2016 copy identifies IATF 0516388 / 2012-0464, site code CAFMP6, issued 12 May 2024 and valid until 11 May 2027. Its scope is manufacture of printed circuit boards; product design is excluded.
The ISO 13485:2016 copy is 0078499-02, issued 2 July 2024, valid until 22 July 2027, for production of PCBs for medical devices at the Huizhou address. It is a management-system scope, not approval of a medical device.
These are manufacturer-hosted copies. Current issuer-register standing and the qualification of your specific lot require confirmation.
The ISO 9001, ISO 14001, ISO 45001 and GJB 9001C copies show effectiveness from 5 September 2025 to 11 September 2028. Their respective registration numbers are 02625Q31160R3M, 02625E30226R3M, 02625S30225R3M and 02625J31887R4M. The listed PCB scopes must be matched to the order.
CQC 19134216549 is dated 21 November 2025, valid until 20 November 2030. Its copy specifies LDJ-2 multilayer boards, 0.6–3.2 mm and other stated conditions. It is not a blanket certification of every aluminium, ceramic or PTFE example in this profile.
The framed directory print identifies E344687 and Huizhou Liandajin Electronics Co. Ltd. It is marked last updated 26 May 2011. That historical copy is retained as such; current UL file-holder status, recognised constructions and material conditions were not established from a live registry in this review.
If UL recognition is required, obtain the current listing and construction details for the supplying entity and compare the actual materials, thickness, temperature and flammability conditions with your design.
Individually reviewed 9 October 2026: twelve original product pages and full-size photographs, eighteen equipment images, nine qualification copies, company/contact/quality/technical pages and the live government maintenance list. Hole basis and laminate grades remain unspecified. Lead times are undated source references; certificate-copy dates do not establish current register standing or lot approval.
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