Privacy Policy
We don't sell your personal information.
Your privacy on HDI PCBs matters to us. We respect the trust you place in us when sharing your contact information, PCB designs, and project details. Sierra Circuits does not sell your personal information.
Your information is handled by Sierra Circuits.
HDIPCBs is operated by Sierra Circuits, Inc., a U.S.-based PCB manufacturer.
All inquiries, quotation requests, orders, technical documentation, and other information submitted through HDIPCBs are received, processed, and managed by Sierra Circuits.
Protecting your intellectual property is a priority.
We understand that your PCB designs and technical documentation may contain valuable proprietary information. Sierra Circuits uses administrative, technical, and physical safeguards to protect the information entrusted to us.
Questions about your privacy on HDI PCBs?
Our team is here to help. For questions about your personal information or privacy rights, please contact Sierra Circuits at CCPA@protoexpress.com.
1. Introduction
This Privacy Policy explains how Sierra Circuits, Inc., doing business as Sierra Protoexpress ("Sierra Circuits," "Sierra," "we," "us," or "our"), collects, uses, stores, and discloses personal information when you visit HDIPCBs (the "Website") or interact with its services.
HDIPCBs provides information about high-density interconnect (HDI) printed circuit board manufacturing and enables visitors to submit inquiries, request quotations, share technical documentation, and initiate orders.
HDIPCBs is operated by Sierra Circuits. All quotation requests, orders, technical inquiries, and manufacturing-related submissions made through HDIPCBs are handled directly by Sierra Circuits.
This Privacy Policy describes our information practices and the privacy rights available to individuals, including California residents under the California Consumer Privacy Act (CCPA), as amended by the California Privacy Rights Act (CPRA).
We may update this Privacy Policy periodically. Changes will be reflected by updating the date at the top of this page.
2. Information We Collect
Depending on how you interact with HDIPCBs, we may collect the following categories of information.
Personal and Contact Information
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Name and email address
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Phone number
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Company name and professional information
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Billing and shipping addresses
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Information provided through contact forms or quotation requests
PCB Design and Technical Information
- • Gerber files, ODB++ files, and other PCB design documentation
• Fabrication drawings and manufacturing specifications
• Project descriptions and technical requirements
• Information necessary to prepare quotations and manufacture PCBs
Website and Device Information
- • IP address and approximate geographic location
• Browser type, device information, and operating system
• Pages visited and referring websites
• Website interactions and usage activity
• Cookies and similar tracking information
Business and Transaction Information
- • Quotation and order history
• Customer communications
• Billing and payment-related information
• Customer service inquiries and support requests
We collect information directly from visitors, automatically through website technologies, and, where applicable, from third-party service providers.
3. How We Use Your Information
Sierra Circuits uses information collected through HDIPCBs for legitimate business and operational purposes, including:
- • Responding to inquiries and quotation requests
• Reviewing PCB designs and manufacturing requirements
• Preparing quotations and processing orders
• Providing PCB fabrication and related engineering services
• Communicating about orders, project requirements, and delivery schedules
• Providing customer service and technical assistance
• Improving website functionality and user experience
• Analyzing website traffic and visitor engagement
• Sending relevant product information, educational content, and marketing communications, subject to applicable laws and preferences
• Preventing fraud, protecting website security, and complying with legal obligations
Information submitted through HDIPCBs may be incorporated into Sierra Circuits' customer relationship management, quotation, order management, and marketing systems.
4. Information Sharing with Sierra Circuits
HDIPCBs is a website operated by Sierra Circuits and is not an independent PCB manufacturing provider.
This includes:
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Contact forms and general inquiries
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Requests for quotations (RFQs)
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PCB design files and manufacturing documentation
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Purchase orders and order-related information
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Technical support requests
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Other communications submitted through the Website
Sierra Circuits is responsible for managing the associated customer communications, quotations, manufacturing activities, and order fulfillment.
5. Cookies, Analytics, and Tracking Technologies
HDIPCBs may use cookies and similar technologies to operate the Website, understand visitor activity, improve functionality, and provide relevant content.
Depending on the technologies implemented on the Website, these may include:
Essential Cookies
Used to support basic website functionality, security, and user sessions.
Analytics Technologies
Tools such as Google Analytics 4 may be used to understand website traffic, page views, visitor interactions, and general usage patterns.
Marketing and Personalization Technologies
Sierra Circuits may use platforms such as Marketo, Salesforce Interaction Studio, and FullStory to analyze website interactions, improve visitor experiences, personalize content, and support customer communications.
Spam Prevention and Security
Google reCAPTCHA may be used to protect forms against automated submissions and abuse. Such technologies may collect IP addresses, device information, and interaction data.
You may manage certain cookies through your browser settings or any applicable cookie preference controls provided on the Website.
Where required by applicable law, non-essential technologies will be subject to appropriate notice and consent.
6. How We Share Personal Information
Sierra Circuits does not sell personal information.
We may disclose personal information to trusted service providers and business partners when reasonably necessary to operate our Website, respond to customer requests, and provide services.
These may include:
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Website hosting and technical service providers
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Analytics and website optimization platforms
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Customer relationship management and marketing automation providers
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Payment processing services
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Shipping and logistics companies
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Business data verification and enrichment providers
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Security and fraud prevention services
Examples of service providers used by Sierra Circuits include Google, Marketo, Salesforce, FullStory, Outreach, ZoomInfo, and shipping providers such as FedEx, UPS, and USPS.
Information may also be disclosed when required by law, regulation, or valid legal process.
We do not disclose personal information to outside organizations for their independent marketing purposes without appropriate authorization or consent.
Sierra Circuits states that it does not sell or share personal information for cross-context behavioral advertising.
7. PCB Design Files and Intellectual Property
We recognize the importance of protecting customers' proprietary designs and technical documentation.
PCB design files, manufacturing drawings, specifications, and related technical information submitted through HDIPCBs are processed by Sierra Circuits for purposes including quotation preparation, technical evaluation, manufacturing, and order fulfillment.
Sierra Circuits uses reasonable administrative, technical, and physical safeguards designed to protect information from unauthorized access, disclosure, alteration, or misuse.
Customers should not submit export-controlled or otherwise restricted technical information through general online forms unless the appropriate submission process has been confirmed with Sierra Circuits.
Additional requirements relating to export-controlled information are described in Sierra Circuits' Terms & Conditions.
8. Data Retention
We retain personal information for as long as reasonably necessary to fulfill the purposes described in this Privacy Policy, including responding to inquiries, managing customer relationships, fulfilling orders, maintaining business records, and complying with legal obligations.
Certain third-party service providers retain information according to their own policies and applicable agreements.
For example, Sierra Circuits' existing privacy documentation identifies Google Analytics 4 retention settings of two months for event data and 14 months for user data.
Retention periods may vary depending on the category of information, the applicable service, and legal or operational requirements.
9. California Privacy Rights (CCPA/CPRA)
California residents may have certain rights regarding their personal information, subject to applicable exceptions.
These include:
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Right to Know: Request information about the personal information collected, used, and disclosed.
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Right to Delete: Request deletion of personal information, subject to legal exceptions.
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Right to Correct: Request correction of inaccurate personal information.
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Right to Opt Out: Opt out of the sale or sharing of personal information, where applicable.
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Right to Limit: Limit certain uses or disclosures of sensitive personal information, where applicable.
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Right to Non-Discrimination: Exercise applicable privacy rights without discriminatory treatment.
Sierra Circuits does not sell personal information or share it for cross-context behavioral advertising, as described in its existing privacy policy.
10. Exercising Your Privacy Rights
To submit a privacy-related request, including a request to access, correct, or delete personal information, please contact Sierra Circuits.
Email: CCPA@protoexpress.com
Subject Line: CCPA Request
Please provide sufficient information to identify your request and allow Sierra Circuits to verify your identity.
You may also submit a customer service request through the Sierra Circuits website:
Authorized agents may submit requests on behalf of individuals, subject to applicable verification requirements.
Sierra Circuits will review and respond to requests in accordance with applicable privacy laws.
11. Marketing Communications
Sierra Circuits may use contact information collected through HDIPCBs to provide relevant communications regarding PCB manufacturing services, educational resources, webinars, technical content, and company updates.
You may opt out of promotional email communications using the unsubscribe link included in applicable messages.
Unsubscribing from marketing communications does not prevent Sierra Circuits from sending necessary transactional communications related to quotations, orders, or customer support.
12. Data Security
Sierra Circuits maintains reasonable administrative, technical, and physical security measures designed to protect personal information and customer technical documentation.
These measures are intended to reduce the risk of unauthorized access, loss, misuse, or disclosure.
However, no method of electronic transmission or storage can be guaranteed to be completely secure.
Customers are encouraged to use approved submission channels when sharing sensitive or confidential technical information.
13. Third-Party Websites
HDIPCBs may contain links to external websites, including Sierra Circuits' primary website and third-party resources.
External websites may operate under their own privacy policies and practices.
We encourage visitors to review the privacy policies of any third-party websites they access.
14. Children's Privacy
HDIPCBs is intended primarily for engineers, businesses, and individuals seeking information about PCB manufacturing services.
The Website is not directed toward children under the age of 16.
Sierra Circuits does not knowingly sell or share the personal information of individuals under 16 years of age.
15. Changes to This Privacy Policy
Sierra Circuits may update this Privacy Policy to reflect changes in business practices, website technologies, legal requirements, or applicable services.
Any updates will be posted on this page with a revised "Last Updated" date.
16. Contact Us
For questions about this Privacy Policy, personal information, or your privacy rights, please contact:
Sierra Circuits, Inc.
Sunnyvale, California, USA
Privacy Requests: CCPA@protoexpress.com
Website: https://www.protoexpress.com
All privacy-related inquiries submitted through HDIPCBs are handled by Sierra Circuits.
Additional Information
For further details regarding Sierra Circuits' information practices, please refer to its full Privacy Policy: