Exhibit 1.01

Siliconware Precision Industries Co., Ltd.

Conflict Minerals Report

For the Year Ended December 31, 2017

Introduction

This is the Conflict Minerals Report (“Report”) of Siliconware Precision Industries Co., Ltd. (“SPIL”, “Company”, “we”, “us” or “our”) for the calendar year ended December 31, 2017 in accordance with Rule 13p-1 under the Securities Exchange Act of 1934 (the “Rule”). The Rule sets forth certain due diligence and reporting obligations for companies registered with the U.S. Securities and Exchange Commission (“SEC”) whose products contain conflict minerals necessary to the functionality or production of a product manufactured by the registrant or contracted by the registrant to be manufacture. The Rule defines “Conflict Minerals” to include cassiterite, columbite-tantalite, gold, wolframite, or their derivatives limited to tin, tantalum, tungsten, and gold (collectively referred to as “3TG”).

SPIL manufactures a wide range of products that contain Conflict Minerals, but does not directly purchase raw ore or unrefined Conflict Minerals, and does not make purchases of other goods, from the Democratic Republic of the Congo (“DRC”) or an adjoining country (collectively referred to as the “Covered Countries”).

Pursuant to the Rule, SPIL conducted a Reasonable Country of Origin Inquiry (“RCOI”) on the source and chain of custody of the necessary Conflict Minerals in our products, which Conflict Materials we had reason to believe may have originated from the Covered Countries and which may not have come from recycled or scrap sources, to determine whether such products were “Conflict Free”. The term “Conflict Free” is used in this Report in a broader sense to refer to suppliers, supply chains, smelters and refiners whose source of Conflict Minerals did not or do not directly finance or benefit armed groups in the Covered Countries.

Business Overview

SPIL is one of the world’s leading independent providers of semiconductor packaging and testing services. We offer a full range of packaging and testing solutions, including advanced packages, substrate packages and lead-frame packages, as well as testing for logic and mixed signal devices. We also offer our customers turnkey service, from packaging and testing to shipment service.

Our Packaging Services

We offer a broad range of package formats designed to provide our customers with a full array of packaging solutions. The packaging solutions we currently offer to our customers include substrate packages, which include ball grid array and system in packages (incorporating multiple semiconductor chips) and bumping and flip-chip ball grid array packages, as well as lead-frame packages.

Our Testing Services

Wafer Probing: Wafer probing is the step immediately before packaging of integrated circuits and involves sorting the processed wafer for defects to ensure that it meets customer acceptance criteria. Integrated circuits on an accepted wafer are then individually inspected visually under microscopes before packaging and final testing.

Final Testing: We provide final testing services for a wide variety of logic and mixed signal and RF integrated circuit packages and other integrated circuit packages, including complex and high performance integrated circuits, as well as lower-performance ones. High-performance products include personal computer-related components such as CPU chipsets and graphic processors, while major lower-performance products include integrated circuits used in consumer electronic products.

Other Testing Services: In addition to wafer probing and final testing services described above, we also provide “system level testing” services for testing products on motherboards, “lead/ball scanner” service to screen out abnormal products, including bent lead or ball defective devices, so as to prevent them from being shipped to the end customers, “marking” services to specify the unique customer logo and batch identification on products and “tape and reel” service to packaging devices into one complete reel for surface mount operation.

We utilize Conflict Minerals which are necessary to implement our packaging services on our customers’ products. No Conflict Minerals are used when conducting testing services.

Reasonable Country of Origin Inquiry

SPIL does not directly purchase unrefined Conflict Minerals, but rather purchases materials from a wide network of suppliers that in turn source materials from a wide network of suppliers that source materials from their sub-tier suppliers. Our supply chain is extensive and complex with many layers of suppliers between us and smelters, refiners, and miners of 3TG.

We require our suppliers to provide us with Material Data Sheets (“MDS”) which specify each and every substance, including but not limited to 3TG, contained in the products and components supplied to us. Based on the MDS we received and through our comprehensive scoping process, we identified 145 suppliers that provided SPIL with Conflict Minerals. Out of those 145 suppliers, we have received 150 3TG sourcing survey results using the industry-wide standard Conflict Minerals Reporting Template (“CMRT”).

After conducting the RCOI for 2017, we may have concerns that the 3TG used in connection with the relevant products may have originated in the Covered Countries, or did not originate from recycled or scrap sources. See “Due Diligence Result” below.

Due Diligence Designs

In accordance with the Rule, SPIL undertook to determine the Conflict Minerals status for the necessary Conflict Minerals used in our packaging services. We designed and conducted our due diligence measures in conformance with the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, Third Edition (“OECD Guidance”), which is an internationally-recognized due diligence network

Due Diligence Designs Performed

Step 1: Establish strong management system

Step 2: Identify and assess risk in our supply chain

Step 3: Design and implement a strategy to respond to identified risks

Step 4: Carry out independent third-party audits of the due diligence practices of smelters and refiners

Step 5: Report annually on supply chain due diligence

Due Diligence Result

Pursuant to the due diligence design and measure performed as described above, we have made a reasonable good faith effort and have found no reasonable basis for determining that SPIL, within our management’s control and authority, sourced Conflict Minerals that directly or indirectly finance or benefit armed groups in the Covered Countries, and as such, that our products and source materials are “DRC Conflict Free”.

Due Diligence Improvement

In the next compliance period, SPIL intends to take the following steps to improve the information gathered from our due diligence measures to further mitigate the risk that the necessary Conflict Minerals may directly or indirectly benefit or finance armed groups in the Covered Countries. These steps include, but are not limited to:

Independent Private Sector Audit

KPMG conducted an independent private sector audit for us and such audit report, which is referred to as the Independent Private Sector Audit, is set forth in Exhibit II hereto.    

Exhibit I: List of all Smelters and Refiners Identified by SPIL

Exhibit II: the Independent Private Sector Audit Report

Independent Accountants’ Report

To the Board of Directors and Stockholders of

Siliconware Precision Industries Co., Ltd.:

We have examined:

Management from the Company is responsible for the design of the Company’s due diligence framework and the description of the Company’s due diligence measures set forth in the Conflict Minerals Report, and performance of the due diligence measures. Our responsibility is to express an opinion on the design of the Company’s due diligence framework and on the description of the due diligence measures the Company performed, based on our examination.

Our examination was conducted in accordance with attestation standards established by the American Institute of Certified Public Accountants and the standards applicable to attestation engagements contained in Government Auditing Standards, issued by the Comptroller General of the United States. Those standards require that we plan and perform the examination to obtain reasonable assurance about whether the design of the Company’s due diligence framework is in conformity with the OECD Due Diligence Guidance and whether the description of the due diligence measures the Company performed is consistent with the due diligence process that the Company undertook, in all material respects. An examination involves performing procedures to obtain evidence about the design of the Company’s due diligence framework and the description of the due diligence measures the Company performed. The nature, timing and extent of the procedures selected depend on our professional judgment, including an assessment of the risks of material misstatement of the design of the Company’s due diligence framework and the description of the due diligence measures the Company performed. We believe that the evidence we obtained is sufficient and appropriate to provide a reasonable basis for our opinion.

Our examination was not conducted for the purpose of evaluating:

Accordingly, we do not express an opinion or any other form of assurance on the aforementioned matters or any other matters included in any section of the Conflict Minerals Report other than the “Due Diligence Designs” and “Due Diligence Designs Performed” sections.

In our opinion,