中川電子有限公司（NKG）成立于1984年，是一家總部位于香港的私營晶體元件公司，專注于石英晶體。

NKG在石英晶體交易平臺上取得了巨大的成功，并于1989年在舟山島開設了第一家工廠。在接下來的幾年中，引入了額外的頻率控制產品，以擴大可以提供的產品范圍。

2006年，制造工廠遷至江蘇蘇州市，并決定與石英領域的其他制造商合作。這一有先見之明的決定帶來了節省成本的好處，同時降低了生產成本，可以轉嫁給客戶，同時還允許通過共同投資最新技術和機器來擴展產品線。

從1984年成立至今，NKG已發展成為世界上最受認可和經驗最豐富的頻率管理產品制造商之一。從簡單的音叉表晶到高穩定性的恒溫箱控制晶體振蕩器，NKG提供業內最全面的頻率管理設備系列。

質量保證  我們致力于通過實施以下系統要求來提供超出客戶期望的產品：

我們的香港總部按照ISO 9001和14000運作。我們的生產基地通過使用TS 16949等附加系統，在先進標準下運行。我們遵循電子行業行為準則（EICC – 今天由 RBA 制定）的目標。生產基地已通過相應的EHS審核。

我們致力于限制使用沖突金屬，并定期檢查我們的供應商，以驗證是否使用受限來源。

工程支持  在該領域擁有30多年經驗的專業工程人員。我們的工程實驗室位于中國和美國。我們為客戶應用提供先進的電路板測試能力。其中包括：

頻率匹配測試，以確保晶體在所需頻率下工作

確定電路的負電阻和電路裕量

確定振蕩器為晶體提供的驅動電平

頻率控制元件和電路板測試的一般介紹的現場培訓

產品環境合規性

自 2004 年以來，我們提供符合 RoHs 標準的產品，大多數完全符合

高熔點焊料合金中所含鉛的豁免7（a），用于某些類型的SMD音叉晶體和電信專用高端振蕩器

壓電器件（用于陶瓷諧振器和濾波器）和玻璃化合物（用于玻璃密封SMD晶體）中所含鉛的例外7（c）

我們的產品無鹵素，符合 IPC J-STD-709 標準，自 2008 年以來已通過驗證

我們持續監控 REACH SVHC 列表的更新，以確保我們所有的產品都符合要求

2008年，我們確認所有產品均含有全氟辛烷磺酸/全氟辛烷磺酸

我們的產品均未在類似塑料的封裝中使用PVC或鄰苯二甲酸鹽

我們的環保合規性延伸到包裝材料

我們所有生產基地都必須進行數小時內XRF檢測

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石英晶振型號