中川电子有限公司（NKG）成立于1984年，是一家总部位于香港的私营晶体元件公司，专注于石英晶体。

NKG在石英晶体交易平台上取得了巨大的成功，并于1989年在舟山岛开设了第一家工厂。在接下来的几年中，引入了额外的频率控制产品，以扩大可以提供的产品范围。

2006年，制造工厂迁至江苏苏州市，并决定与石英领域的其他制造商合作。这一有先见之明的决定带来了节省成本的好处，同时降低了生产成本，可以转嫁给客户，同时还允许通过共同投资最新技术和机器来扩展产品线。

从1984年成立至今，NKG已发展成为世界上最受认可和经验最丰富的频率管理产品制造商之一。从简单的音叉表晶到高稳定性的恒温箱控制晶体振荡器，NKG提供业内最全面的频率管理设备系列。

质量保证  我们致力于通过实施以下系统要求来提供超出客户期望的产品：

我们的香港总部按照ISO 9001和14000运作。我们的生产基地通过使用TS 16949等附加系统，在先进标准下运行。我们遵循电子行业行为准则（EICC – 今天由 RBA 制定）的目标。生产基地已通过相应的EHS审核。

我们致力于限制使用冲突金属，并定期检查我们的供应商，以验证是否使用受限来源。

工程支持  在该领域拥有30多年经验的专业工程人员。我们的工程实验室位于中国和美国。我们为客户应用提供先进的电路板测试能力。其中包括：

频率匹配测试，以确保晶体在所需频率下工作

确定电路的负电阻和电路裕量

确定振荡器为晶体提供的驱动电平

频率控制元件和电路板测试的一般介绍的现场培训

产品环境合规性

自 2004 年以来，我们提供符合 RoHs 标准的产品，大多数完全符合

高熔点焊料合金中所含铅的豁免7（a），用于某些类型的SMD音叉晶体和电信专用高端振荡器

压电器件（用于陶瓷谐振器和滤波器）和玻璃化合物（用于玻璃密封SMD晶体）中所含铅的例外7（c）

我们的产品无卤素，符合 IPC J-STD-709 标准，自 2008 年以来已通过验证

我们持续监控 REACH SVHC 列表的更新，以确保我们所有的产品都符合要求

2008年，我们确认所有产品均含有全氟辛烷磺酸/全氟辛烷磺酸

我们的产品均未在类似塑料的封装中使用PVC或邻苯二甲酸盐

我们的环保合规性延伸到包装材料

我们所有生产基地都必须进行数小时内XRF检测

stablished in 1984, NAKAGAWA Electronics Limited (NKG) is a privately-owned crystal components company based in Hong Kong focused on quartz crystals.

NKG achieved great success in their quartz crystal trading platform and in 1989 expanded by launching their first factory in Zhoushan Island. In the following years, additional frequency control products were introduced to broaden the line of products that could be offered.

In 2006 the manufacturing plant moved to Suzhou City, Jiangsu, and the decision was made to collaborate with other manufacturers in the quartz sector. This prescient decision resulted in cost-saving benefits that simultaneously reduced costs of production which could be passed on to the customer whilst also allowing for an expansion of the product line through co-investment into the latest technology and machinery.

From its inception in 1984 through to the present day, NKG has grown to become one of the most recognized and experienced manufacturers of frequency management products in the world. From simple tuning fork crystals to high stability oven-controlled crystal oscillators, NKG offers the most comprehensive line of frequency management devices in the industry

Quality Assurance

We are committed to delivering products that exceed the customer’s expectations by implementing the following system requirements:

Our Hong Kong HQ operates under ISO 9001 and 14000. Our manufacturing sites operate under advanced standards by utilizing additional systems such as TS 16949. We follow the aims of the electronic industry code of conduct (EICC – today by RBA). Manufacturing sites have passed corresponding EHS audits.

We are committed to the restricted use of conflict metals and routinely inspect our suppliers in order to verify non-use of restricted sources.

Engineering Support

Professional engineering personnel with over 30 years of experience in the field. Our engineering labs located are located in China and the USA. We offer advanced board testing capability for customer applications. These include:

Frequency matching test to ensure crystal works at the desired frequency

Determination of circuit’s negative resistance and circuit margin

Determination of drive level that oscillator provides for the crystal

On-site training for general introduction of frequency control components and board tests

Product Environmental Compliance

We offer RoHs compliant products since 2004, majority fully compliant

Exemption 7(a) for Pb contained in high melting point solder alloy, used in certain types of SMD tuning fork crystals and special high- end oscillators for telecom

Exception 7(c) for Pb contained in piezoelectric devices (used in ceramic resonators and filters) and in glass compound (used in glass seal SMD crystal)

Our products are halogen-free per IPC J-STD-709, verified since 2008

We are continuously monitoring for updates of REACH’s list of SVHC’s in order to ensure that all our products remain compliant

In 2008 we obtained confirmation that all our products be of PFOS/PFOA

None of our products use PVC or phthalates in plastic-like encapsulations

Our environmental compliance extends to packaging materials

In-hours XRF testing is mandatory at all our manufacturing sites石英晶振型号